参考答案和解析
正确答案:D
更多“19.A.on B.with C.near D.at ”相关问题
  • 第1题:

    关于抗凝血酶(AT)的临床意义,正确的是

    A.AT活性增高为异常,活性减低无临床意义

    B.AT活性减低为异常,增高无临床意义

    C.AT活性增高或减低,均可导致出血

    D.AT活性增高可导致出血,减低导致血栓形成

    E.AT活性减低可导致出血,增高可导致血栓形成


    正确答案:D
    AT为体内主要的抗凝蛋白,因而其增高可导致出血,减低可导致血栓形成。

  • 第2题:

    计算结果不是字符串“Student”的语句是( )。

    A.left(”Student”,7)

    B.substr(”MyStudent”,3,7)

    C.right(”MyStudent”,7)

    D.at(”MyStudent”,3,7)


    正确答案:D
    at()函数的功能是返回一个字符表达式或备注字段在另一个字符表达式或备注字段中首次出现的位置,其结果是数值型的。所以选项D结果不是字符串。

  • 第3题:

    在下列表达式中,运算结果是逻辑真的是( )。

    A.EMPTY(.NULL.)

    B.EMPTY(SPACE(8))

    C.LIKE("edit","edi?")

    D.AT("a","ainimal")


    正确答案:B
    解析:EMPTY函数是“空值”测试函数,它的格式是:EMPTY(表达式>),功能是根据指定表达式的运算结果是否为“空”值,返回逻辑真或逻辑假。
    注意:这里指的“空”值与NULL值是两个不同的概念。函数EMPTY(.NULL.)的返回值为逻辑假。所以选项@A)@的返回值为逻辑假,选项B)返回的值是逻辑真。
    LIKE函数是字符串匹配函数,它的格式是LIKE(字符表达式1>,字符表达式2>);功能是比较两个字符串对应位置上的字符,若所有对应字符都相匹配,函数返回逻辑真,否则返回逻辑假。字符表达式1>中可以包含通配符*和?,*可与任何数目的字符相匹配,?可与任何单个字符相匹配。所以选项C)返回的是逻辑假。
    AT()函数的格式是:AT(字符表达式1>,字符表达式2>[,数值表达式>D;功能是如果字符表达式1>是字符表达式2>的子串,则返回字符表达式1>值的首字符在字符表达式2>中的位置;若不是子串,则返回0。函数值为数值型。

  • 第4题:

    用频谱多普勒测肺动脉高压的肺动脉血流有什么特点:()。

    A.血流加速时间及射血时间延长(AT、ET),射血前时间延长(PEP)

    B.AT、PEP延长,ET缩短

    C.血流加速时间缩短(AT),射血时间缩短(ET),射血前时间延长(PEP)

    D.AT、ET、PEP均缩短

    E.AT、ET无变化,PEP延长


    参考答案:C

  • 第5题:

    下列选项中得不到字符型数据的是______。

    A.DTOC(DATE())

    B.DTOC(DATE(),1)

    C.STR(123.567)

    D.AT("1",STP-1321)


    正确答案:D

  • 第6题:

    对此患者比较合理的降压治疗方案是

    A.钙通道阻滞药和ACEI

    B.利尿药和p阻滞药

    C.利尿药和AT受体阻滞药

    D.AT受体阻滞药和ACEI

    E.利尿药和钙通道阻滞药


    正确答案:ACE

  • 第7题:

    电源同样也有()结构之分。

    A.立式和卧式

    B.AT和ATX

    C.微型和中型

    D.AT和ATX


    参考答案:B

  • 第8题:

    下列关于主动脉瓣口狭窄,哪项是正确的

    A.射流的加速时间(AT)越短,瓣口狭窄越重

    B.射流的射血时间(ET)越长,瓣口狭窄越重

    C.AT/ET比值越大,瓣口狭窄越重

    D.AT/ET比值越小,瓣口狭窄越重

    E.以上均不对


    本题答案:C

  • 第9题:

    根据以下材料,回答题
    In a telephone survey of more than 2,000adults,21% said they believed the sun revolved (旋转) around the earth. An 51 7% did not know which revolvedaround 52. I have no doubt that 53 all of these people were 54 inschool that the earth revolves around the sun: 55 may even have written it 56 a test. But they never 57 their incorrect mental models ofplanetary(行星的) 58 because their everydayobservations didn′t support 59 their teachers told them: People seethe sun "moving" 60 the sky as morning turns to night, and theearth seems stationary(静止的) 61 that ishappening.
    Students can learn the right answers 62 heart in class, and yet never combinedthem 63 their working models of the world.The objectively correct answer the professor accepts and the 64 personal understanding of the world can 65 side by side, each unaffected bythe other.
    Outside of class, the students like to seethe 66 model because it has always worked well 67 that circumstance. Unless professorsaddress 68 errors in students′ personal models of the world, studentsare not 69 to replace them with 70 one.


    A.on
    B.with
    C.under
    D.for

    答案:A
    解析:
    考查习惯搭配。on atest意为“在考试中”。句意为“他们甚至在考试中写过”。故选A。

  • 第10题:

    His encounter( )the dog had completelly unnerved him.

    A.to
    B.with
    C.of
    D.for

    答案:B
    解析:
    考查名词+介词词组。encounter with sth.表示“与……的相遇”。故本题选B。句意:他碰到条狗,把他吓得半死。

  • 第11题:

    急性白血病出血的主要原因是

    A.DIC

    B.血小板减少

    C.纤维蛋白溶解

    D.AT一Ⅲ减少

    E.小血管被白血病细胞浸润破坏


    正确答案:B
    急性白血病出血的主要原因是血小板减低,可表现为牙龈出血、鼻出血,皮肤瘀点、瘀斑。M3易并发DIC,颅内出血常是致死原因。

  • 第12题:

    目前流行的PC机中使用的主板是( )。

    A.PC板

    B.ATX 板

    C.NLX板

    D.AT 板


    正确答案:B

  • 第13题:

    利用SQL的GRANT语句可向用户授予操作权限。当用该语句向用户授予操作权限时,若允许用户将获得的权限再授予其他用户,应在该语句中使用短语( )。 A.WITH PRIVILEGES B.WITH OPTION C.WITH GRANT OPTION D.WITH ALL PRIVILEGES


    正确答案:C
    在SQL语言中,允许获得某种权限的用户把某种权限的用户把这种权限再转授给其他用户,则在该语句中使用短语 WITH GRANT OPTION

  • 第14题:

    在下列表达式中,运算结果逻辑为真的是( )。 A.EMPTY(.NULL.)B.EMPTY(SPACE(8))

    在下列表达式中,运算结果逻辑为真的是( )。

    A.EMPTY(.NULL.)

    B.EMPTY(SPACE(8))

    C.LIKE(”edit”,”edi?”)

    D.AT(”a”,”ainimal”)


    正确答案:B
    B。【解析】EMPTY函数是“空值”测试函数,它的格式是:EMPTY(<表达式>),功能是根据指定表达式的运算结果是否为“空”值,返回逻辑真或逻辑假。注意:这里指的“空”值与NULL值是两个不同的概念。函数EMPTY(.NULL.)的返回值为逻辑假。所以选项A的返回值为逻辑假,选项B返回的值是逻辑真。LIKE函数是字符串匹配函数,它的格式是:LIKE(<字符表达式1>,<字符表达式2>),功能是:比较两个字符串对应位置上的字符,若所有对应字符都相匹配,函数返回逻辑真,否则返回逻辑假。<字符表达式1>中可以包含通配符+和?。“*”可与任何数目的字符相匹配,“?”可与任何单个字符相匹配,所以选项C返回的是逻辑假。AT函数的格式是:AT(<字符表达式1>,<字符表达式2>[,<数值表达式>]),功能是:如果<字符表达式l>是<字符表达式2>的子串,则返回<字符表达式1>值的首字符在<字符表达式2>中的位置;若不是子串,则返回0。其函数值为数值型。

  • 第15题:

    心力衰竭晚期,心脏变成球形,其发生机制正确的是

    A.心肌损害,心室重构

    B.小动脉收缩,心脏后负荷增加

    C.体循环淤血,心脏前负荷增加

    D.ATⅡ活性异常

    E.心钠素分泌增多


    正确答案:A

  • 第16题:

    4. Lucy was very sorry __________ being late ,but what the teacher said made her better.

    A.for ,feel

    B.to ,to feel

    C.about ,feeling '

    D.at ,felt


    正确答案:A

  • 第17题:

    用频谱多普勒测肺动脉高压的肺动脉血流的特点

    A.血流加速时间及射血时间延长(AT,ET),射血前时间延长(PEP)

    B.AT,PEP延长,ET缩短

    C.AT,E.T缩短,PEP延长

    D.AT,ET,PEP均缩短

    E.AT和ET无变化,PEP延长


    本题答案:C, D

  • 第18题:

    The CEO of the company has been consistent ________ his policy associated with foreign investments over the last few years.

    A.of
    B.with
    C.at
    D.for

    答案:B
    解析:

  • 第19题:

    We love peace, yet we are not the kindof people to yield ______ any military threat.

    A.up
    B.to
    C.in
    D.at

    答案:B
    解析:
    考查习惯搭配。句意“虽然我们热爱和平,但是我们不会屈服于任何军事威胁”。yield当“屈服,让步,投降”讲时是不及物动词,与介词to连用,意为“屈服于,投降”,B项为正确答案。yield与up连用时,意为“放弃(让渡)”;yield当动词讲时没有与介词in或at的搭配。

  • 第20题:

    单选题
         When I was young, I spent my summer vacations on my grandparents' farm. The summer that I graduated from college, I  56   my grandparents once again. When I arrived,I discovered that there was a family  57  in progress.     Grandpa's dog and hunting partner, Rusty, had taken on a very bad   58  in his old age. He had begun  59   into the chicken coop (鸡笼) and eating eggs. In the eyes of the local farmers,  60 dogs started stealing eggs, there was no  61  to cure them. They knew there was only one thing to be done  62   such a dog-you had to shoot it and the sooner the  63  .     Rusty and Grandpa were old friends. Grandpa certainly didn't  64   to shoot Rusty,but he knew it needed to be done. The 66egg money was Grandma's private income, so you can imagine  65  she felt about the problem. 66  the inexperienced confidence of youth, I told Grandpa that I thought I couldcurethe egg-stealing dog. I wanted to at least have a  67  to save Rusty's life, and save Grandpa from the sadness of  68  Rusty.      The next morning, I broke open six fiesh eggs and put them in Rusty's bowl   69 at the door to the chicken coop. Rusty came 70  and noticed the eggs. He quickly  71   the eggs and happily walked off for his nap (打盹). The following morning I did the  72  thing.I put the eggs a few feet away from the chicken coop, toward the back door of the farmhouse  73   Grandma usually fed Rusty. The next day I again moved the bowl closer to the house, and added some dog food to the eggs. Every day I moved the bowl closer to the back door, mixing more dog food and   74   eggs. By the time the bowl reached the door, it was all dog food and no eggs. Rusty had again become   75 to looking for his food at the back door of the house, and never again went into the chicken coop.66.A.In          B.With       C.On         D.At
    A

    A

    B

    B

    C

    C

    D

    D


    正确答案: B
    解析: