--How amazing it is that astronauts are exploring outer space!--It’s a challenge, I guess, man against nature.A. of B. for C. by D. about
题目
--How amazing it is that astronauts are exploring outer space!
--It’s a challenge, I guess, man against nature.
A. of B. for C. by D. about
相似考题
参考答案和解析
正确答案：A
更多“－－How amazing it is that astronauts are exploring outer space! －－It’s a challenge, I g ”相关问题
-
第1题：
At a party or social occasions, how would you indicate that it was time for you to leave someone's house?
A、I would say, "It's getting late and I'd better be going."
B、I would say, "I'm sorry. I have to leave now."
C、I would wait until the host said something.
D、I would make up an excuse (e.g. I have to get up early tomorrow, etc.) and thank the hosts.
参考答案：A
-
第2题：
2.Some persons have traveled into outer space afte［A］the universe［B］Earth’s gravity
［C］the earth［D］outer space
选择B选项
解析：第一部分第三段最后一句话Only within the past 25 years, however, have some of its passengers broken free of Earth’s gravity. -
第3题：
outer space选择Cosmic ( 宇宙的) rays of various kinds come __________ the air from outer space
[A] across
[B] to
[C] from
[D] through
是完型填空吧？你要把整篇都传上来这样片面的截句无法给出答案。
-
第4题：
（31）有以下程序
#include <stdio.h>
main()
{ char a[30],b[30];
scanf("%s",a);
gets(b);
printf("%s\n %s\n",a,b);
}
程序运行时若输入：
how are you? I am fine<回车>
则输出结果是
A）how are you? B）how
I am fine are you? I am fine
C）how are you? I am fine D）row are you?
正确答案：B
-
第5题：
共用题干
第二篇
The Mir Space Station
The Russian Mir Space Station,which came down in 2001 at last after 15 years of pioneering the concept of long-term human space flight,is remembered for its accomplishments in the human space flight history.It can be credited with many firsts in space.
During Mir's lifetime,Russia spent about US $4.2 billion to build and maintain the station.
The Soviet Union launched Mir,which was designed to last from three to five years,on February 20, 1986,and housed 104 astronauts over 12 years and seven months,most of whom were not Russian.In fact, it became the first international space station by playing host to 162 people from 1 1 countries.From 1995 through 1998,seven astronauts from the United States took turns living on Mir for up to six months each.They were among the 37 Americans who visited the station during nine stopovers by space shuttles.
The more than 400 million the United States provided Russian for the visits not only kept Mir operating,but also gave the Americans and their partners in the international station project valuable experience in long-term flight and multinational operations.
A debate continues over Mir's contributions to science.During its existence,Mir was the laboratory for 23,000 experiments and carried scientific equipment,estimated to be worth $80 million,from many nations.Experiments on Mir are credited with a range of findings,from the first solid measurement of the ration of heavy helium（氦）atoms in space to how to grow wheat in space.But for those favouring human space exploration,Mir showed that people could live and work in space long enough for a trip to Mars.The longest single stay in space is the 437.7 days that Russian astronaut Valery Polyakov spent on Mir from 1994 to 1995.And Sergie Avdeyev accumulated 747.6 days in space in three trips to the space station.The longest American stay was that of Shannon Lucid,who spent 188 days aboard Mir in 1996.
Despite the many firsts Mir accomplished,1997 was a bad year out of 15 for Mir.In 1997,an oxygen generator caught fire.Later,the main computer system broke down,causing the station to drift several times and there were power failures.Most of these problems were repaired,with American help and suppliers,but Mir's reputation as a space station was ruined.
Mir's setbacks are nothing,though,when we compare them with its accomplishments.Mir was a tremendous success,which will be remembered as a milestone in space exploration and the space station that showed long-term human habitation in space was possible.But it's time to move on to the next generation.The International Space Station being built will be better,but it owes a great debt to Mir.We can learn from the passage that the Mir Space Station______.
A:was designed to last over 5 years
B:played host to 7 astronauts from different countries
C:was visited only by Americans
D:was built by Russians答案：D解析：本篇文章主要介绍了和平号空间站经受的挫折和对人类的卓越贡献。
由第二段可知，和平号空间站是由苏联建造的。
第五段主要介绍了和平号空间站对科学作出的贡献，除了为人类探索空间提供实验场地和设备外，和平号空间站还证明人们可以在太空中停留足够长的时间。
A项在文中未提到，可直接排除；由第六段第四句可知，和平号空间站又被修好了，并未完全被摧毁，所以C项错误。其名声受损并不仅仅是因为电力故障，D项也不正确。由第六段第三句可知，B项正确。
由最后一段最后一句可知，正在建设中的国际空间站将比和平号空间站更完善，这表明各国联合操控的空间站的发展势头良好。
本篇文章介绍了和平号空间站对人类的贡献，最后一段又提到其历史意义，特别是最后一句又表明多国合作的空间站的发展离不开和平号空间站的贡献，由此可以推测出作者对和平号空间站是持赞许态度的。 -
第6题：
共用题干
Motion Sickness
Living in space looks like lots of fun.You can do certain things in space(like floating
around,or pushing huge objects)that you cannot do on earth.But being in space can do
things to you,too.If you stay too long in a gravity-free environment,your bones could
become weak,and a small spaceship just might annoy you after a while,because space
travel could make you seasick!
On July 4, 1982,after seven days orbiting the earth,astronauts Thomas K. Mattingly
and Henry W. Hartsfield returned home.Although not all of the experiments on board
worked properly,the flight basically seemed to be a success except for one"little"thing:
early in the flight,astronaut Hartsfield became"seasick".
Thomas Mattingly,who is also a jet pilot and is highly resistant to motion sickness on
earth,did much better.Mattingly sailed through space with a steady stomach.But no one
knows why Hartsfield felt uneasy and Mattingly did not.
So far it seems there is no reliable way to predict who will become motion sick in
outer space and who will not.In all,at least four astronauts have suffered from space
motion sickness. Russian and American scientists are working together to try to
understand and solve the motion sickness.Space program officials worry that if so
many highly-trained pilots get sick in space,what will happen when civilians start flying
in the shuttle?
Motion sickness is a disagreeable feeling that comes from the pitching,rolling,
swaying,or just the moving of the object you are riding in or on.Symptoms of motion
sickness include:dizziness,headache,a sinking feeling in the stomach,and vomiting
（呕吐）.
Why does motion make some people ill?
Doctors believe that motion sickness is caused by a disturbance in the inner ear.Our
ears do more than give us hearing.A part of the ears gives us a sense of balance and helps
make us aware of whether we are right side up or upside down.
If you know that you get carsick or seasick,what can you do?
Speak to your doctor. There are certain medicines available that can help stop that
uneasy feeling.But many of them can also make you sleepy.Usually they work best taken
before you begin feeling ill.
Some people also recommend water,ice cubes,mints,or plain toast.But these
remedies do not always work for everyone.
Perhaps,since motion sickness is such a big problem in outer space,researchers
may soon find a way to cure the astronauts一and those of us who stay on earth.Floating in space for too long a time may also do harm to one's lungs and heart.
A:Right
B:Wrong
C:Not mentioned答案：C解析： -
第7题：
共用题干
Motion Sickness
Living in space looks like lots of fun.You can do certain things in space(like floating
around,or pushing huge objects)that you cannot do on earth.But being in space can do
things to you,too.If you stay too long in a gravity-free environment,your bones could
become weak,and a small spaceship just might annoy you after a while,because space
travel could make you seasick!
On July 4, 1982,after seven days orbiting the earth,astronauts Thomas K. Mattingly
and Henry W. Hartsfield returned home.Although not all of the experiments on board
worked properly,the flight basically seemed to be a success except for one"little"thing:
early in the flight,astronaut Hartsfield became"seasick".
Thomas Mattingly,who is also a jet pilot and is highly resistant to motion sickness on
earth,did much better.Mattingly sailed through space with a steady stomach.But no one
knows why Hartsfield felt uneasy and Mattingly did not.
So far it seems there is no reliable way to predict who will become motion sick in
outer space and who will not.In all,at least four astronauts have suffered from space
motion sickness. Russian and American scientists are working together to try to
understand and solve the motion sickness.Space program officials worry that if so
many highly-trained pilots get sick in space,what will happen when civilians start flying
in the shuttle?
Motion sickness is a disagreeable feeling that comes from the pitching,rolling,
swaying,or just the moving of the object you are riding in or on.Symptoms of motion
sickness include:dizziness,headache,a sinking feeling in the stomach,and vomiting
（呕吐）.
Why does motion make some people ill?
Doctors believe that motion sickness is caused by a disturbance in the inner ear.Our
ears do more than give us hearing.A part of the ears gives us a sense of balance and helps
make us aware of whether we are right side up or upside down.
If you know that you get carsick or seasick,what can you do?
Speak to your doctor. There are certain medicines available that can help stop that
uneasy feeling.But many of them can also make you sleepy.Usually they work best taken
before you begin feeling ill.
Some people also recommend water,ice cubes,mints,or plain toast.But these
remedies do not always work for everyone.
Perhaps,since motion sickness is such a big problem in outer space,researchers
may soon find a way to cure the astronauts一and those of us who stay on earth.Russian and American scientists are working together to solve the problem of motion sickness in astronauts.
A:Right
B:Wrong
C:Not mentioned答案：A解析： -
第8题：
共用题干
第三篇
Human Space Exploration
While scientists are searching the cause of the Columbia disaster,NASA is moving
ahead with plans to develop a new craft that would replace shuttles（航天飞机）on space
station missions by 2012 and respond quickly to space station emergencies.
The space agency released the first set of mission needs and requirements several days
ago for the orbital space plane（轨道航天飞机）,which would be designed to transport a
crew of four to and from the International Space Station.
Although it includes few specifics, the plan states the orbiter（轨道航天飞机）will be
safer,cheaper and require less preparation time than the shuttle.It would be able to
transport four crew members by 2012一though it would be available for rescue missions by
2010.NASA says the craft should be able to transport injured or ill space station crew
members to "definitive（决定性的）medical care" within 24 hours.
The release of the requirements showed NASA remains focused on the long-term
priorities of space exploration,even as questions exist concerning the loss of Columbia and
its seven-member crew on February 1,2003.
Experts at Marshall Space Flight Center in Huntsville,Alabama,have been working for
years on a successor to the shuttle.The project,known as the Space Launch Initiative（倡
议）,was divided last year into two parts一one focusing on a future launch vehicle,the
other on a space station orbiter. The orbiter is expected to be ready sooner.
The program's managers say NASA officials have told them not to alter Space
Launch Initiative in light of the Columbia disaster.
U.S. President George W. Bush asked Congress for about U.S.$1 billion for Space
Launch Initiative in 2004,funds that would be almost equally split between the Orbital Space
Plane and Next Generation Launch Technology.NASA plans to design the new space craft to
A:control the International Space Station.
B:carry astronauts to the International Space Station.
C:transport equipment to the International Space Station.
D:train astronauts in space flights.答案：B解析： -
第9题：
单选题The best title for this passage is _____.ATraveling in Space
BSleeping in the Spacecraft.
CEquipment Used by Astronauts.
DThe Earth Seen from Outer Space.
正确答案： D解析：
主旨归纳题。文章一开始提到飞船中没有床，而是用睡袋睡觉，在第二、三段中说明了在飞船中的睡眠时间，文章的最后介绍了宇航员睡觉的姿势和自己睡觉的偏好和习惯，因此可以断定文章主要说的是在宇宙飞船中是如如何睡觉的。故正确答案为B。A、C、D项都是以偏概全，说法过于片面。 -
第10题：
单选题The cylinder is fitted with internal liner so that a water space is left （） the liner and the outer wall.Aaround
Bamong
Cin
Dbetween
正确答案： D解析： 暂无解析 -
第11题：
单选题Which of the following would make the most appropriate title for this passage?AGoing Boldly Where No One Has Gone Before: The Promise and Peril of Interstellar Space Travel
BThe Day The Earth Stood Still: Why Interstellar Space Travel Is Essential to Human Survival
CThe Wrath of Larson: Egbert Larson’s Quest to Build an Interstellar Spacecraft
DBusted Flat in Beta Regulus: The Crushing Challenges of Interstellar Space Travel
ESay It Isn’t So, Mr. Einstein: Egberr Larson’s Challenge to the Theory of Relativity
正确答案： C解析：
主旨题。通过文章内容可知，本文是对Egbert Larson的一本书的书评，Larson的书主要从理论上阐述了进行太空旅行所面临的困难，故D项最符合文意。 -
第12题：
单选题The transition of the Earth’s magnetic field is possibly caused by _____.Athe flows of melted iron inside the Earth
Bthe periodical movement of the Earth
Cthe mechanical energy of the solar system
Dthe force coming from outer space
正确答案： A解析：
文章最后一段：谁也不能准确地知道为什么地球磁场会周期性转换，但是科学家说其原因可能在于地壳中融化了的铁的无序流动，它们看起来就像木星上组成云的气体一样。 -
第13题：
有以下程序 #include<stdio．h> main（ ） {char a[3O]，b[30]； scanf("%S"，a)； gets(b)； printf("%s\n%s\\n"，a，b)； } 程序运行时若输入： how are you? I am fine<回车> 则输出结果是（ ）。
A.how are you? I am fine
B.how are you?I am fine
C.how are you?I am fine
D.how are you?
正确答案：B
此题主要考查scanf函数和gets函数的区别。答案为B。 -
第14题：
有以下程序
include<stdio．h>
main()
{char a[30]，b[30]；
scanf(“％s”，a)；
gets(b)；
printf(“％s＼n％s＼n”，a，b)；
}
程序运行时若输入：
how are you? I am fine<回车>
则输出结果是
A．how are you? I am fine
B．how are you? 1 am fine
C．how are you？ I am fine
D．how are you?
正确答案：B
-
第15题：
Scope , complexity ,and scale of even a single 5G netwoork are massively largherthan in today's networks .The main challenge is automation on all levels of the 5G eco system.without it , the network sScope , complexity ,and scale of even a single 5G netwoork are massively largherthan in today's networks .The main challenge is automation on all levels of the 5G eco system.without it , the network simply will not work; nei ther for the anticipated scale nor for the desired functional complexity .
Fundamentally , automation is realized bya largely self-governed network bound to varying business goals : ifs configuration , its services , how they are provided , and how it is managed . A governance model , ideally realized by policies , defines how these goals are implenented andmoni tored . Those policies can be low-level confi gurati on parameters , mid -level strategies or high-level intents and goals . Using a mix of these -policies implies translation between : top-down for realization and bottom-up for action / benefit and validation purposes .
Networks and models must address multiple , diverse constituencies . Human intervention should be kept to a minimum ( oversight ) . Managenment means monitoring and repair ; not control . Classic self capabilities are the benefits
1.The main challenge is ( )on all levels of the 5G eco-system
A．rate
B.data
C.automation
D.managemont
2.A ( ) model , ideally realized by policies , defines how these goals are implemented and monitored
A．goverment
B.governance
C.automation
D.automatic
3.Human intorvention should be kepe on to a( )
A．minimum
B.monitoring
C.repair
D.control
4.The main idea of this shot article is( )
A． the main challenge of 5G
B. the compexity of 5G network
C. a automation model
D. human intervention
参考答案：1.C 2.B 3.A 4.A
-
第16题：
共用题干
第二篇
The Mir Space Station
The Russian Mir Space Station,which came down in 2001 at last after 15 years of pioneering the concept of long-term human space flight,is remembered for its accomplishments in the human space flight history.It can be credited with many firsts in space.
During Mir's lifetime,Russia spent about US $4.2 billion to build and maintain the station.
The Soviet Union launched Mir,which was designed to last from three to five years,on February 20, 1986,and housed 104 astronauts over 12 years and seven months,most of whom were not Russian.In fact, it became the first international space station by playing host to 162 people from 1 1 countries.From 1995 through 1998,seven astronauts from the United States took turns living on Mir for up to six months each.They were among the 37 Americans who visited the station during nine stopovers by space shuttles.
The more than 400 million the United States provided Russian for the visits not only kept Mir operating,but also gave the Americans and their partners in the international station project valuable experience in long-term flight and multinational operations.
A debate continues over Mir's contributions to science.During its existence,Mir was the laboratory for 23,000 experiments and carried scientific equipment,estimated to be worth $80 million,from many nations.Experiments on Mir are credited with a range of findings,from the first solid measurement of the ration of heavy helium（氦）atoms in space to how to grow wheat in space.But for those favouring human space exploration,Mir showed that people could live and work in space long enough for a trip to Mars.The longest single stay in space is the 437.7 days that Russian astronaut Valery Polyakov spent on Mir from 1994 to 1995.And Sergie Avdeyev accumulated 747.6 days in space in three trips to the space station.The longest American stay was that of Shannon Lucid,who spent 188 days aboard Mir in 1996.
Despite the many firsts Mir accomplished,1997 was a bad year out of 15 for Mir.In 1997,an oxygen generator caught fire.Later,the main computer system broke down,causing the station to drift several times and there were power failures.Most of these problems were repaired,with American help and suppliers,but Mir's reputation as a space station was ruined.
Mir's setbacks are nothing,though,when we compare them with its accomplishments.Mir was a tremendous success,which will be remembered as a milestone in space exploration and the space station that showed long-term human habitation in space was possible.But it's time to move on to the next generation.The International Space Station being built will be better,but it owes a great debt to Mir.It can be inferred from the last paragraph that______.
A:space exploration will not experience setbacks
B:it is difficult for other space stations to exceed Mir's success
C:Mir is the best long-term human habitation in space in history
D:multinational space operations are getting more accomplishments答案：D解析：本篇文章主要介绍了和平号空间站经受的挫折和对人类的卓越贡献。
由第二段可知，和平号空间站是由苏联建造的。
第五段主要介绍了和平号空间站对科学作出的贡献，除了为人类探索空间提供实验场地和设备外，和平号空间站还证明人们可以在太空中停留足够长的时间。
A项在文中未提到，可直接排除；由第六段第四句可知，和平号空间站又被修好了，并未完全被摧毁，所以C项错误。其名声受损并不仅仅是因为电力故障，D项也不正确。由第六段第三句可知，B项正确。
由最后一段最后一句可知，正在建设中的国际空间站将比和平号空间站更完善，这表明各国联合操控的空间站的发展势头良好。
本篇文章介绍了和平号空间站对人类的贡献，最后一段又提到其历史意义，特别是最后一句又表明多国合作的空间站的发展离不开和平号空间站的贡献，由此可以推测出作者对和平号空间站是持赞许态度的。 -
第17题：
The key to the industrialization of space is the U.S.space shuttle.With it,t astronauts will acquire a workhouse vehicle（ ）of flying into space and returning many times.Powered by reusable rockets that can lift a load of 65,000 pounds,the shuttle will carry devices for scientific inquiry，as well as a variety of military hardware.A.capable
B.suitable
C.efficient
D.fit答案：A解析：capable of doing是固定搭配，意为“能够做……，有能力做……”。 -
第18题：
共用题干
Motion Sickness
Living in space looks like lots of fun.You can do certain things in space(like floating
around,or pushing huge objects)that you cannot do on earth.But being in space can do
things to you,too.If you stay too long in a gravity-free environment,your bones could
become weak,and a small spaceship just might annoy you after a while,because space
travel could make you seasick!
On July 4, 1982,after seven days orbiting the earth,astronauts Thomas K. Mattingly
and Henry W. Hartsfield returned home.Although not all of the experiments on board
worked properly,the flight basically seemed to be a success except for one"little"thing:
early in the flight,astronaut Hartsfield became"seasick".
Thomas Mattingly,who is also a jet pilot and is highly resistant to motion sickness on
earth,did much better.Mattingly sailed through space with a steady stomach.But no one
knows why Hartsfield felt uneasy and Mattingly did not.
So far it seems there is no reliable way to predict who will become motion sick in
outer space and who will not.In all,at least four astronauts have suffered from space
motion sickness. Russian and American scientists are working together to try to
understand and solve the motion sickness.Space program officials worry that if so
many highly-trained pilots get sick in space,what will happen when civilians start flying
in the shuttle?
Motion sickness is a disagreeable feeling that comes from the pitching,rolling,
swaying,or just the moving of the object you are riding in or on.Symptoms of motion
sickness include:dizziness,headache,a sinking feeling in the stomach,and vomiting
（呕吐）.
Why does motion make some people ill?
Doctors believe that motion sickness is caused by a disturbance in the inner ear.Our
ears do more than give us hearing.A part of the ears gives us a sense of balance and helps
make us aware of whether we are right side up or upside down.
If you know that you get carsick or seasick,what can you do?
Speak to your doctor. There are certain medicines available that can help stop that
uneasy feeling.But many of them can also make you sleepy.Usually they work best taken
before you begin feeling ill.
Some people also recommend water,ice cubes,mints,or plain toast.But these
remedies do not always work for everyone.
Perhaps,since motion sickness is such a big problem in outer space,researchers
may soon find a way to cure the astronauts一and those of us who stay on earth.The motion sickness some astronauts suffered from during space travel had been caused by the defective digestive system.
A:Right
B:Wrong
C:Not mentioned答案：B解析： -
第19题：
The key to the industrialization of space is the U.S. space shuttle.______ it, astronauts will be able to fly into space and returning many times.A.With
B.By
C.On
D.In答案：A解析：题目意为“航天工业的关键是美国的航天飞机。有了它，宇航员将能够飞到太空并多次返回。”此处with表示“拥有”之意。
-
第20题：
单选题The key to the industrialization of space is the US space shuttle with it, astronauts will acquire a workhouse vehicle _____ of flying into space and returning many times.Acapable
Bsuitable
Cefficient
Dfit
正确答案： B解析：
句意：空间产业化的关键是美国航天飞机，宇航员将获得一个能够多次往返于太空和地球的工作车。空格后的of表示只有capable能用在此处。suitable与to或for连用。fit与for连用。efficient有效率的。 -
第21题：
单选题A mere touch at the wall of the cabin can _____ the astronauts flying about in the space ship.Aenable
Bsend
Cmake
Dplace
正确答案： D解析：
句意：宇航员在舱内轻轻接触舱壁就能飞来飞去。send sb. doing ...使某人进入某种状态。 -
第22题：
单选题What is the author´s primary purpose in writing the passage?ARevealing the procedures for foreign adoptions.
BRecounting an amazing childhood camping experience.
CInvestigating how Hidden Valley serves foreign adoption families.
DDemonstrating how culture camps help foreign adoption families.
正确答案： A解析： -
第23题：
问答题Practice 4 The furthest we have been is the Moon. If we want to travel into deep space, beyond our own backyard, the Solar System, we’ll need a new breed of spacecraft. It may be the oldest clich6 in town, but in the not too distant future science fiction will turn into science fact. The fantastic spaceships of sci-fi comic books and novels will no longer be a figment of our creative imagination; they may be the real vision of our future. Engineers and designers are already designing craft capable of propelling us beyond Earth’s orbit, the Moon and the planets. They’re designing interstellar spaceships capable of travel across the vast emptiness of deep space to distant stars and new planets in our unending quest to conquer and discover. Our Universe contains over a billion galaxies; star cities each with a hundred billion inhabitants. Around these stars must exist planets and perhaps life. The temptation to explore these new realms is too great. First things first-we’ll have to build either a giant orbiting launch platform, far bigger than the International Space Station (ISS), or a permanently manned lunar base to provide a springboard for the stars. Some planners feel we should limit ourselves to robotic probes, but others are firmly committed to sending humans. “There’s a debate right now about how to explore space,” says astronaut Bill Shepherd, destined to be the first five-aboard Commander of the ISS. “Humans or machines-I think they’re complementary.” The Human Problem Space is the most hostile environment we will ever explore. Even a single five-hour spacewalk requires months of training, and a vast technical backup to keep it safe. The astronauts and cosmonauts who live aboard the ISS will be there for only a few weeks or months; if we want to travel into deep space it could take years. First we’ll have to find out just how long the human body can survive in a weightless environment. In zero gravity, four pints of body fluid rush from the legs to the head where it stays for the duration of the mission. Astronauts often feel as if they have a permanent cold, and disorientation can become a major problem. In space there’s no physical sensation to let you know when you’re upside down and astronauts have to rely on visual clues from their surroundings. A few hours after reaching orbit, one in three of all astronauts will experience space sickness-a feeling rather like carsickness. And weightless conditions lead to calcium being leached from the bones, and problems with the astronauts’ immune systems. Trillions of rocky fragments-meteoroids-roam our Solar System at speeds of up to150, 000 miles an hour. A meteoroid no bigger than a grain of salt could pierce a spaceship window. Protection from the extreme hazards of space is going to need some clever technology. Space is also full of lethal radiation-X-rays, gamma rays and the high-speed particles called cosmic rays.正确答案： 参考译文
我们人类迄今所到过的最远的地方是月球。要想穿越地球的后院——太阳系,进入外层空间,我们需要一种新型的宇宙飞船。
“飞天”,也许是城里人老掉牙的传说。但在不久的将来,这些科幻小说中的故事将化为科学的事实。科幻连环图画杂志和小说中各式各样奇特怪异的宇宙飞船,将不再只是人类创造性的空想,它们有可能成为未来的真实景象。
工程师和设计者已在着手进行飞船的设计工作,这种飞船能将人类送离地球轨道,以及月球和九大行星以外的太空。他们正在设计能穿越浩瀚的外层空间,到达遥远恒星和带外行星的星际飞船,以助人类实现不断征服和揭开宇宙奥秘的追求。整个宇宙拥有十亿多个河外星系,一个河外星系就是一座星城,每座星城有“居民”上千亿颗。在这些恒星周围必定有行星存在,或许,还有生命存在。探索这些未知的领域实在太具吸引力了。
重要的事情先来。我们必须建造一座巨型的轨道发射台,其规模要远大于国际空间站,或者,建造一个长期驻人的月球基地,作为飞往周围恒星的“跳板”。一些设计者认为,我们应控制在机器探测的限度内,而其他设计者则坚决主张将人送入太空。“目前正在就如何探索太空的问题展开辩论,”宇航员比尔·谢泼德如是说。他被任命为国际空间站首任驻站指挥官。“人或机器——我认为两者是相辅相成的。”
人类的问题
太空是人类探索所进入的最恶劣的环境。即便是一趟5小时的太空行走,也需要数月的强化训练,以及庞大的技术支持来确保其安全。居住在国际空间站的美、苏宇航员将在太空中逗留几周或几个月;但假使我们想要进入太阳系外的外层空间,则需要呆上数年。首先,我们得确定人体在失重的情况下能坚持多久。在零重力的环境中,有将近4品脱的血液会从肢端涌至头部,并且,这种状况将一直持续到太空任务结束为止。宇航员常会有一种持久的寒冷感,搞不清方向将是他们遇到的最大问题。在太空中,你无法从生理上感知自己是倒立还是正立着,宇航员只能通过观察周围的环境据以作出推断。在进入轨道后的几小时内,三名宇航员中便会有一人出现宇宙病——一种类似晕车的感觉。同时,失重的环境会导致钙质从骨骼中流失,并引起宇航员免疫系统的紊乱。
无数岩石块,即流星体,以每小时15万英里的速度漫游在太阳系中。即便是盐粒大小的流星体也足以穿透宇宙飞船的船窗。为了避免太空中隐藏的巨大危险,我们需要一些先进奇巧的技术手段。同时,宇宙中充满了致命的射线——x射线、r射线,还有被称为宇宙射线的高速粒子束。解析： 暂无解析