单选题In some cases the organisms that cause blood poisoning enter the bloodstream through contaminated needles or other improperly sterilized instruments.A contactedB infectedC contagiousD infectious

共用题干
Leukemia

Leukemia is the most common type of cancer kids get,but it is still very rare.Leukemia involves the
blood and blood-forming organs,such as the bone marrow.________(46)
A kid with leukemia produces lots of abnormal white blood cells in the bone marrow. Usually,white
blood cells fight infection,but the white blood cells in a person with leukemia don't work the way they're
supposed to.________(47)The abnormal white blood cells multiply out of control,filling the bone marrow
and making it hard for enough normal,infection-fighting white blood cells to form.Other blood cells一such as
red blood cells(that carry oxygen in the blood to the body's tissues)and platelets(that allow blood to
clot）一are also crowded out by the white blood cells of leukemia. These cancer cells may also move to other
parts of the body,including the bloodstream,where they continue to multiply and build up.
Although leukemia can make kids sick,most of the time it is treatable,and kids get better. Almost all
leukemia patients are treated with chemotherapy,which means using anti-cancer drug.
________(48)Chemotherapy quickly goes to work,traveling through the blood to the bone marrow.
There,the drugs can attack the cancer cells.After several weeks of chemotherapy,many kids begin to feel
better.
Some children with leukemia will also have to have radiation therapy,too.________(49)If the cancer
isn't getting better from using the usual amounts of chemotherapy and radiation,then a kid with leukemia
will probably need more treatment一with higher doses of chemotherapy and radiation to finally kill the cancer
cells.But this heavy-duty treatment will also harm the normal cells in the kid's bone marrow too,and the
bone marrow will no longer be able to produce normal blood cells.So,doctors will then give a kid一or anyone
else with bone marrow that is no longer working一normal bone marrow tissue from someone else who is
healthy.________(50)

___________（50）
A:The chemotherapy drugs are given through a catheter,a narrow tube that is inserted into a blood vessel, sometimes in the kid's upper chest.
B:Early symptoms of leukemia are often overlooked,since they may resemble symptoms of the flu or other common diseases.
C:This is a special procedure called a bone marrow transplant,and it helps the patient make new blood cells so they can recover from the leukemia.
D:Bone marrow is the innermost part of some bones where blood cells are first made.
E:They don't protect the person from infections very well.
F: Radiation therapy uses invisible high-energy waves(similar to X-rays)to kill cancerous cells.

共用题干
Surgery Involving the Heart

1 The heart-lung machine(pump-oxygenator)is a valuable addition to the modern operating room.
This machine has made it possible to perform many operations on the heart and other thoracic organs which
could not otherwise be done.There are several types of machines in use,all of which serve as a temporary
substitute for the patient's heart and lungs.
2 The machine siphons off the blood from the large vessels entering the heart on the right side so that
no blood passes through the heart and lungs.The blood is returned to the general circulation for body
distribution through one of the large arteries.While passing through the machine,the blood is oxygenated by
means of an oxygen inlet,and carbon dioxide is removed by various chemical means.These are the processes
that normally take place between the blood and the air in the lung tissue.While in the machine,the blood is
also deformed to be sure that all air bubbles are removed,since such bubbles could be fatal to the patient by
obstructing blood vessels.An electric motor in the machine serves as a pump during the surgical procedure to
distribute the processed blood throughout the body by means of the artery mentioned above.
3 Diseased valves may become deformed and scarred from endocarditis so that they are ineffective and
often obstructive.In some cases a special small knife can be inserted into the heart chamber and the valve
can be cut so that it no longer obstructs the blood flow. The valve may even become partially functional.In
other cases there may be so much damage that replacement is the only resort. Substitute valves,made of
plastic materials have proved to be a lifesaving measure for many patients.Very thin butterfly valves made of
dacron（涤纶）or other synthetic material have also been successfully used.
4 Artificial hearts or parts of hearts designed to assist the ventricles in their pumping function have not
proved as successful as the artificial valves.However,research continues and it is quite possible that an
effective device may soon be ready for use.More spectacular is the transplantation of a human heart from the
body of a person who has recently died.Tissues of the donor and the recipient should be as closely matched
as possible to avoid rejection by the recipient's antibody mechanism.This rejection syndrome is the most
serious problem related to heart transplants.

Endocarditis may cause valves to be damaged________.
A:and finally they fail to function properly
B:to perform many surgical operations on the chest
C:when it passes through the heart-lung machine
D:and they no longer obstruct the blood flow
E:to match tissues of the donor and the recipient
F: when the ineffective valves are replaced by artificial ones

共用题干
Acupuncture一Old Chinese Medicine

For more than 4,000 years people in Asia have used acupuncture to treat illnesses.________ (46)Today acupuncture is also very popular in Europe,America and Australia.
Acupuncture can control pain and sickness.It can also be used if you have a headache or back pain.Some doctors use acupuncture along with regular treatments for asthma,high blood pressure or stress.________(47)Some people think that acupuncture can treat depression and even help people to stop smoking. Many patients feel more energy after a treatment,while others may feel more relaxed.
People who practice acupuncture must take courses to learn how to do it correctly._________(48)
During treatment the patient lies down and needles are stuck into certain points of the body. There are hundreds of possible points and each one has a certain effect on the body._________(49) For example you stick a needle into the hand to treat problems with your stomach.
Acupuncture needles are made of metal and about as thick as a human hair. They normally go less than one cm into the skin.When they are in the skin the acupuncturist may twist them or send electricity through them.The patients rest for a short time and then the needles are removed.
Acupuncture normally doesn't hurt. There is also a milder form of acupuncture called acupressure where you don't need needles.Doctors use their fingers to press the points of the body.
Chinese medicine teaches us that all acupuncture points are located along pathways called meridians.Each of these meridians carries energy,which the Chinese call "qi" to certain points of the body.If this "qi" gets blocked from an area the person will get sick or feel pain.Sticking needles into the correct points can help "qi" flow again and make the person well.
Doctors today are not sure how acupuncture really works.They have not found any proof that these pathways of energy really exist.Some think that needles cause the body to produce pain killing substances.________(50)Some also say that acupuncture only works because patients believe in it.

_________（50）
A:In many places,especially outside of Asia,only doctors are allowed to perform acupuncture.
B:The earliest written record of acupuncture is found in the Huangdi Neijing.
C:Doctors have even used acupuncture to stop pain during an operation.
D:The points can also be very far away from the place of pain.
E:Others think that the needles block pain signals that travel along the nerves to the brain.
F: It is an old Chinese form of healing in which your skin is pierced with thin needles to relieve pain.

共用题干
第一篇

Food Poisoning

Food sometimes gets poisoned with harmful things,A person who eats such food can get an illness called
food poisoning. Food poisoning is usually not serious,but some types are deadly.The symptoms of food poi-
soning usually begin within hours of eating the poisoned food.Fever is one of the most common symptoms.
Certain microorganisms（微生物）cause most types of food poisoning. Bacteria and other microorganisms
can poison eggs,meat,vegetables,and many other foods.After entering the body,these tiny living things re-
lease（释放）poisons that make people sick.
Some chemicals can also cause food poisoning. They are often added to food while it is being grown,pro-
cessed,or prepared.For example,many farmers spray chemicals on crops to kill weeds and insects.Some
people may have a bad reaction to those chemical、when they eat the crops.
Some plants and animals contain natural poisons that are harmful to people.These includo certain kinds
of seafood,grains,nuts,seeds,beans,and mushrooms.
When people handle food properly,the risk of food poisoning is very small.Microorganisms multiply rapidly
in dirty places and in warm temperatures.This means that people should never touch food with dirty hands or
put food on unwashed surfaces.Food should be kept in a refrigerator to stop microorganisms from growing,
Meat needs to be cooked thoroughly to kill any dangerous microorganisms. People should also wash food covered
with chemicals before eating it.Finally,people should not eat wild mushrooms or other foods that grow in the
wild.Some of these foods may contain natural materials that are poisonous to humans.In addition,some types
of fish can be poisonous.
Most people recover from food poisoning after a few days of resting and drinking extra water. If people
eat natural poisons,they must go to the hospital right away to have their stomachs emptied.

From Paragraph 5,we can learn that_______________.
A:mushrooms should not he eaten
B:vegetables are safer than meat and seafood
C:natural poisons are more dangerous than chemicals
D:different types of food should he handled differently

共用题干
Geology and Health
1. The importance of particular metals in the human diet has been realized within the past few decades,and the idea that geology might be related to health has been recognized for a number of elements such as iodine,zinc and selenium. For example,soils with low iodine contents produce crops,and animals deficient in iodine.A lack of iodine in the human diet leads to some serious diseases.
2.The ultimate source of metals within the human body is rocks,which weather into soil.gaining or losing some of their chemical constituents. The crops we eat selectively remove from the soil the elements that they require for growth .The water we drink contains trace elements leached from rock and soil. Thus the geology and geochemistry of the environments have effects on the chemis-try and health of plants,animals and people.
3. So far there is no data to suggest that people living on metal-rich soils experience a potential health hazard. The levels of metals within naturally contaminated soils are generally not high enough to cause serious health problems.Living on metal-rich soils does not represent a health risk unless large quantities of soil are digested or metal-rich dust is inhaled.However,small chil-dren are particularly exposed to metal-rich topsoil in playgrounds and gardens. They are also the most likely ones to eat potentially dangerous metal-rich soil.
4. Heavy metals are persistent:they do not break down to other chemicals in the environment. Industrially polluted sites usually undergo intensive clean-up and rehabilitation because heavy metals are a health concern once they enter the food chain. Some trace metals are alleged to cause cancer and are also known to cause poisoning.
5.In contrast,naturally contaminated soils have not been subject to risk assessment studies and rehabilitation measures,despite the fact that they frequently possess metal concentrations well above those of such polluted by humans and above environmental quality criteria.
6.There is a vital need to understand the potential risks and long-term health effects of living on naturally contaminated soils.Future environmental investigations of naturally polluted soils should concentrate on the potential pathways of metals into the food chain and human body.Geologists should be part of such studies as they can provide the essential background information on rock and soil chemistry as well as the chemical forms of heavy metal pollution.

Industrially contaminated sites usually require a thorough clean-up due to______＿.
A:.industrially polluted soils
B: rock and soil chemistry
C:.naturally polluted soils
D: the pathways of metals into the food chain
E: the element of iodine
F: the persistence of heavy metals

共用题干
Geology and Health
1. The importance of particular metals in the human diet has been realized within the past few decades,and the idea that geology might be related to health has been recognized for a number of elements such as iodine,zinc and selenium. For example,soils with low iodine contents produce crops,and animals deficient in iodine.A lack of iodine in the human diet leads to some serious diseases.
2.The ultimate source of metals within the human body is rocks,which weather into soil.gaining or losing some of their chemical constituents. The crops we eat selectively remove from the soil the elements that they require for growth .The water we drink contains trace elements leached from rock and soil. Thus the geology and geochemistry of the environments have effects on the chemis-try and health of plants,animals and people.
3. So far there is no data to suggest that people living on metal-rich soils experience a potential health hazard. The levels of metals within naturally contaminated soils are generally not high enough to cause serious health problems.Living on metal-rich soils does not represent a health risk unless large quantities of soil are digested or metal-rich dust is inhaled.However,small chil-dren are particularly exposed to metal-rich topsoil in playgrounds and gardens. They are also the most likely ones to eat potentially dangerous metal-rich soil.
4. Heavy metals are persistent:they do not break down to other chemicals in the environment. Industrially polluted sites usually undergo intensive clean-up and rehabilitation because heavy metals are a health concern once they enter the food chain. Some trace metals are alleged to cause cancer and are also known to cause poisoning.
5.In contrast,naturally contaminated soils have not been subject to risk assessment studies and rehabilitation measures,despite the fact that they frequently possess metal concentrations well above those of such polluted by humans and above environmental quality criteria.
6.There is a vital need to understand the potential risks and long-term health effects of living on naturally contaminated soils.Future environmental investigations of naturally polluted soils should concentrate on the potential pathways of metals into the food chain and human body.Geologists should be part of such studies as they can provide the essential background information on rock and soil chemistry as well as the chemical forms of heavy metal pollution.

Some diseases is connected with deficiency of_______.
A:.industrially polluted soils
B: rock and soil chemistry
C:.naturally polluted soils
D: the pathways of metals into the food chain
E: the element of iodine
F: the persistence of heavy metals

共用题干
第一篇

Food Poisoning

Food sometimes gets poisoned with harmful things,A person who eats such food can get an illness called
food poisoning. Food poisoning is usually not serious,but some types are deadly.The symptoms of food poi-
soning usually begin within hours of eating the poisoned food.Fever is one of the most common symptoms.
Certain microorganisms（微生物）cause most types of food poisoning. Bacteria and other microorganisms
can poison eggs,meat,vegetables,and many other foods.After entering the body,these tiny living things re-
lease（释放）poisons that make people sick.
Some chemicals can also cause food poisoning. They are often added to food while it is being grown,pro-
cessed,or prepared.For example,many farmers spray chemicals on crops to kill weeds and insects.Some
people may have a bad reaction to those chemical、when they eat the crops.
Some plants and animals contain natural poisons that are harmful to people.These includo certain kinds
of seafood,grains,nuts,seeds,beans,and mushrooms.
When people handle food properly,the risk of food poisoning is very small.Microorganisms multiply rapidly
in dirty places and in warm temperatures.This means that people should never touch food with dirty hands or
put food on unwashed surfaces.Food should be kept in a refrigerator to stop microorganisms from growing,
Meat needs to be cooked thoroughly to kill any dangerous microorganisms. People should also wash food covered
with chemicals before eating it.Finally,people should not eat wild mushrooms or other foods that grow in the
wild.Some of these foods may contain natural materials that are poisonous to humans.In addition,some types
of fish can be poisonous.
Most people recover from food poisoning after a few days of resting and drinking extra water. If people
eat natural poisons,they must go to the hospital right away to have their stomachs emptied.

Food poisoning can be caused by all of the following EXCEPT_______________.
A:some chemicals
B:low temperatures
C:some tiny living things
D:certain natural materials

共用题干
Surgery Involving the Heart

1 The heart-lung machine(pump-oxygenator)is a valuable addition to the modern operating room.
This machine has made it possible to perform many operations on the heart and other thoracic organs which
could not otherwise be done.There are several types of machines in use,all of which serve as a temporary
substitute for the patient's heart and lungs.
2 The machine siphons off the blood from the large vessels entering the heart on the right side so that
no blood passes through the heart and lungs.The blood is returned to the general circulation for body
distribution through one of the large arteries.While passing through the machine,the blood is oxygenated by
means of an oxygen inlet,and carbon dioxide is removed by various chemical means.These are the processes
that normally take place between the blood and the air in the lung tissue.While in the machine,the blood is
also deformed to be sure that all air bubbles are removed,since such bubbles could be fatal to the patient by
obstructing blood vessels.An electric motor in the machine serves as a pump during the surgical procedure to
distribute the processed blood throughout the body by means of the artery mentioned above.
3 Diseased valves may become deformed and scarred from endocarditis so that they are ineffective and
often obstructive.In some cases a special small knife can be inserted into the heart chamber and the valve
can be cut so that it no longer obstructs the blood flow. The valve may even become partially functional.In
other cases there may be so much damage that replacement is the only resort. Substitute valves,made of
plastic materials have proved to be a lifesaving measure for many patients.Very thin butterfly valves made of
dacron（涤纶）or other synthetic material have also been successfully used.
4 Artificial hearts or parts of hearts designed to assist the ventricles in their pumping function have not
proved as successful as the artificial valves.However,research continues and it is quite possible that an
effective device may soon be ready for use.More spectacular is the transplantation of a human heart from the
body of a person who has recently died.Tissues of the donor and the recipient should be as closely matched
as possible to avoid rejection by the recipient's antibody mechanism.This rejection syndrome is the most
serious problem related to heart transplants.

The heart-lung machine is an essential helper for surgeons________.
A:and finally they fail to function properly
B:to perform many surgical operations on the chest
C:when it passes through the heart-lung machine
D:and they no longer obstruct the blood flow
E:to match tissues of the donor and the recipient
F: when the ineffective valves are replaced by artificial ones

共用题干
Surgery Involving the Heart

1 The heart-lung machine(pump-oxygenator)is a valuable addition to the modern operating room.
This machine has made it possible to perform many operations on the heart and other thoracic organs which
could not otherwise be done.There are several types of machines in use,all of which serve as a temporary
substitute for the patient's heart and lungs.
2 The machine siphons off the blood from the large vessels entering the heart on the right side so that
no blood passes through the heart and lungs.The blood is returned to the general circulation for body
distribution through one of the large arteries.While passing through the machine,the blood is oxygenated by
means of an oxygen inlet,and carbon dioxide is removed by various chemical means.These are the processes
that normally take place between the blood and the air in the lung tissue.While in the machine,the blood is
also deformed to be sure that all air bubbles are removed,since such bubbles could be fatal to the patient by
obstructing blood vessels.An electric motor in the machine serves as a pump during the surgical procedure to
distribute the processed blood throughout the body by means of the artery mentioned above.
3 Diseased valves may become deformed and scarred from endocarditis so that they are ineffective and
often obstructive.In some cases a special small knife can be inserted into the heart chamber and the valve
can be cut so that it no longer obstructs the blood flow. The valve may even become partially functional.In
other cases there may be so much damage that replacement is the only resort. Substitute valves,made of
plastic materials have proved to be a lifesaving measure for many patients.Very thin butterfly valves made of
dacron（涤纶）or other synthetic material have also been successfully used.
4 Artificial hearts or parts of hearts designed to assist the ventricles in their pumping function have not
proved as successful as the artificial valves.However,research continues and it is quite possible that an
effective device may soon be ready for use.More spectacular is the transplantation of a human heart from the
body of a person who has recently died.Tissues of the donor and the recipient should be as closely matched
as possible to avoid rejection by the recipient's antibody mechanism.This rejection syndrome is the most
serious problem related to heart transplants.

Paragraph 3________
A:The Heart Transplantation
B:How the Heart-lung Machine Works
C:A Machine Making Many Kinds of Thoracic Operations Possible
D:A Temporary Substitute for the Diseased Valve
E:Operations on Cardiac Valves and Substitutes for Valves
F: How Every Part of the Heart Performs Its Function

共用题干
Surgery Involving the Heart

1 The heart-lung machine(pump-oxygenator)is a valuable addition to the modern operating room.
This machine has made it possible to perform many operations on the heart and other thoracic organs which
could not otherwise be done.There are several types of machines in use,all of which serve as a temporary
substitute for the patient's heart and lungs.
2 The machine siphons off the blood from the large vessels entering the heart on the right side so that
no blood passes through the heart and lungs.The blood is returned to the general circulation for body
distribution through one of the large arteries.While passing through the machine,the blood is oxygenated by
means of an oxygen inlet,and carbon dioxide is removed by various chemical means.These are the processes
that normally take place between the blood and the air in the lung tissue.While in the machine,the blood is
also deformed to be sure that all air bubbles are removed,since such bubbles could be fatal to the patient by
obstructing blood vessels.An electric motor in the machine serves as a pump during the surgical procedure to
distribute the processed blood throughout the body by means of the artery mentioned above.
3 Diseased valves may become deformed and scarred from endocarditis so that they are ineffective and
often obstructive.In some cases a special small knife can be inserted into the heart chamber and the valve
can be cut so that it no longer obstructs the blood flow. The valve may even become partially functional.In
other cases there may be so much damage that replacement is the only resort. Substitute valves,made of
plastic materials have proved to be a lifesaving measure for many patients.Very thin butterfly valves made of
dacron（涤纶）or other synthetic material have also been successfully used.
4 Artificial hearts or parts of hearts designed to assist the ventricles in their pumping function have not
proved as successful as the artificial valves.However,research continues and it is quite possible that an
effective device may soon be ready for use.More spectacular is the transplantation of a human heart from the
body of a person who has recently died.Tissues of the donor and the recipient should be as closely matched
as possible to avoid rejection by the recipient's antibody mechanism.This rejection syndrome is the most
serious problem related to heart transplants.

The blood is oxygenated and carbon dioxide in it is removed________.
A:and finally they fail to function properly
B:to perform many surgical operations on the chest
C:when it passes through the heart-lung machine
D:and they no longer obstruct the blood flow
E:to match tissues of the donor and the recipient
F: when the ineffective valves are replaced by artificial ones

共用题干
Geology and Health
1. The importance of particular metals in the human diet has been realized within the past few decades,and the idea that geology might be related to health has been recognized for a number of elements such as iodine,zinc and selenium. For example,soils with low iodine contents produce crops,and animals deficient in iodine.A lack of iodine in the human diet leads to some serious diseases.
2.The ultimate source of metals within the human body is rocks,which weather into soil.gaining or losing some of their chemical constituents. The crops we eat selectively remove from the soil the elements that they require for growth .The water we drink contains trace elements leached from rock and soil. Thus the geology and geochemistry of the environments have effects on the chemis-try and health of plants,animals and people.
3. So far there is no data to suggest that people living on metal-rich soils experience a potential health hazard. The levels of metals within naturally contaminated soils are generally not high enough to cause serious health problems.Living on metal-rich soils does not represent a health risk unless large quantities of soil are digested or metal-rich dust is inhaled.However,small chil-dren are particularly exposed to metal-rich topsoil in playgrounds and gardens. They are also the most likely ones to eat potentially dangerous metal-rich soil.
4. Heavy metals are persistent:they do not break down to other chemicals in the environment. Industrially polluted sites usually undergo intensive clean-up and rehabilitation because heavy metals are a health concern once they enter the food chain. Some trace metals are alleged to cause cancer and are also known to cause poisoning.
5.In contrast,naturally contaminated soils have not been subject to risk assessment studies and rehabilitation measures,despite the fact that they frequently possess metal concentrations well above those of such polluted by humans and above environmental quality criteria.
6.There is a vital need to understand the potential risks and long-term health effects of living on naturally contaminated soils.Future environmental investigations of naturally polluted soils should concentrate on the potential pathways of metals into the food chain and human body.Geologists should be part of such studies as they can provide the essential background information on rock and soil chemistry as well as the chemical forms of heavy metal pollution.

Paragraph 1______
A:.No evidence to indicate bad effects of naturally contaminated soil
B:.Potential hazards of human contaminated soils
C: Research on channels of heavy metals getting into human food chain
D: Geology and health problems
E:.Rocks-the ultimate source of soil pollution
F: Long-term health effects on children

共用题干
第一篇

Food Poisoning

Food sometimes gets poisoned with harmful things,A person who eats such food can get an illness called
food poisoning. Food poisoning is usually not serious,but some types are deadly.The symptoms of food poi-
soning usually begin within hours of eating the poisoned food.Fever is one of the most common symptoms.
Certain microorganisms（微生物）cause most types of food poisoning. Bacteria and other microorganisms
can poison eggs,meat,vegetables,and many other foods.After entering the body,these tiny living things re-
lease（释放）poisons that make people sick.
Some chemicals can also cause food poisoning. They are often added to food while it is being grown,pro-
cessed,or prepared.For example,many farmers spray chemicals on crops to kill weeds and insects.Some
people may have a bad reaction to those chemical、when they eat the crops.
Some plants and animals contain natural poisons that are harmful to people.These includo certain kinds
of seafood,grains,nuts,seeds,beans,and mushrooms.
When people handle food properly,the risk of food poisoning is very small.Microorganisms multiply rapidly
in dirty places and in warm temperatures.This means that people should never touch food with dirty hands or
put food on unwashed surfaces.Food should be kept in a refrigerator to stop microorganisms from growing,
Meat needs to be cooked thoroughly to kill any dangerous microorganisms. People should also wash food covered
with chemicals before eating it.Finally,people should not eat wild mushrooms or other foods that grow in the
wild.Some of these foods may contain natural materials that are poisonous to humans.In addition,some types
of fish can be poisonous.
Most people recover from food poisoning after a few days of resting and drinking extra water. If people
eat natural poisons,they must go to the hospital right away to have their stomachs emptied.

It can be inferred from the passage that_______________.
A:natural materials are safe in food processing
B:chemicals are needed in food processing
C:food poisoning can be kept under control
D:food poisoning is out of control

共用题干
第一篇

Food Poisoning

Food sometimes gets poisoned with harmful things,A person who eats such food can get an illness called
food poisoning. Food poisoning is usually not serious,but some types are deadly.The symptoms of food poi-
soning usually begin within hours of eating the poisoned food.Fever is one of the most common symptoms.
Certain microorganisms（微生物）cause most types of food poisoning. Bacteria and other microorganisms
can poison eggs,meat,vegetables,and many other foods.After entering the body,these tiny living things re-
lease（释放）poisons that make people sick.
Some chemicals can also cause food poisoning. They are often added to food while it is being grown,pro-
cessed,or prepared.For example,many farmers spray chemicals on crops to kill weeds and insects.Some
people may have a bad reaction to those chemical、when they eat the crops.
Some plants and animals contain natural poisons that are harmful to people.These includo certain kinds
of seafood,grains,nuts,seeds,beans,and mushrooms.
When people handle food properly,the risk of food poisoning is very small.Microorganisms multiply rapidly
in dirty places and in warm temperatures.This means that people should never touch food with dirty hands or
put food on unwashed surfaces.Food should be kept in a refrigerator to stop microorganisms from growing,
Meat needs to be cooked thoroughly to kill any dangerous microorganisms. People should also wash food covered
with chemicals before eating it.Finally,people should not eat wild mushrooms or other foods that grow in the
wild.Some of these foods may contain natural materials that are poisonous to humans.In addition,some types
of fish can be poisonous.
Most people recover from food poisoning after a few days of resting and drinking extra water. If people
eat natural poisons,they must go to the hospital right away to have their stomachs emptied.

Which of the following statements is NOT true?
A:Food when poisoned can make people sick.
B:Food poisoning means death.
C:F0od poisoning comes in varieties.
D:Food poisoning can be serious,

共用题干
第一篇

Food Poisoning

Food sometimes gets poisoned with harmful things,A person who eats such food can get an illness called
food poisoning. Food poisoning is usually not serious,but some types are deadly.The symptoms of food poi-
soning usually begin within hours of eating the poisoned food.Fever is one of the most common symptoms.
Certain microorganisms（微生物）cause most types of food poisoning. Bacteria and other microorganisms
can poison eggs,meat,vegetables,and many other foods.After entering the body,these tiny living things re-
lease（释放）poisons that make people sick.
Some chemicals can also cause food poisoning. They are often added to food while it is being grown,pro-
cessed,or prepared.For example,many farmers spray chemicals on crops to kill weeds and insects.Some
people may have a bad reaction to those chemical、when they eat the crops.
Some plants and animals contain natural poisons that are harmful to people.These includo certain kinds
of seafood,grains,nuts,seeds,beans,and mushrooms.
When people handle food properly,the risk of food poisoning is very small.Microorganisms multiply rapidly
in dirty places and in warm temperatures.This means that people should never touch food with dirty hands or
put food on unwashed surfaces.Food should be kept in a refrigerator to stop microorganisms from growing,
Meat needs to be cooked thoroughly to kill any dangerous microorganisms. People should also wash food covered
with chemicals before eating it.Finally,people should not eat wild mushrooms or other foods that grow in the
wild.Some of these foods may contain natural materials that are poisonous to humans.In addition,some types
of fish can be poisonous.
Most people recover from food poisoning after a few days of resting and drinking extra water. If people
eat natural poisons,they must go to the hospital right away to have their stomachs emptied.

A:are always accompanied by a fever
B:are too common to be noted
C:can be noticed within hours
D:can he ignored