关于冠脉血流量的描述不正确的是()。 A.心动周期缩短,冠脉血流量减少 B.冠脉血流

题型:单项选择题 A1/A2型题

问题:

关于冠脉血流量的描述不正确的是()。

A.心动周期缩短,冠脉血流量减少

B.冠脉血流量是和心肌代谢水平成正比

C.外周阻力增大,动脉舒张压升高,冠脉血流量增多

D.甲状腺素增多时冠脉血流减少

E.安静状态下,人冠脉血流量为每百克心肌每分钟60~80mL

考点:病案信息技术(主管技师)生理学生理学题库
题型:单项选择题 A1/A2型题

某溶液中只含有Na+、H+、OH-、A-四种离子,下列说法正确的是(  )

A.若溶液中c(A-)=c(Na+),则溶液一定呈中性

B.溶液中不可能存在:c(Na+)>c (A-)>c(OH-)>c(H+

C.若c(OH-)>c(H+),溶液中不可能存在:c(Na+)>c(OH-)>c(A-)>c(H+

D.若溶质为NaA、HA,则一定存在:c(A-)>c(Na+)>c(H+)>c(OH-

题型:单项选择题 A1/A2型题

依次填入下面文字横线处的语句衔接最恰当的一组是(   )(2分)

几乎所有人都怕犯错误,            ;“犯错误”简直是他们的一种常备心态。

① 真正的文学家总是人类思维成果和感觉定势的挑战者

② 没有一本优秀的小说或诗歌,是循规蹈矩写出来的

③ 把女人比作鲜花,把土地比作母亲,这些比喻初创之时,不都是物类混淆的“错误”么

④ 而把声音当色彩来写,把味觉当触觉来写,这些手法对实际而言不都是感觉乱套的“错误”么

⑤ 犯错误却是人类的专长,是作家最重要的本领

⑥ 没有前人胡思乱想地犯下这些个“错误”,怎么会有今天的文学

A.③②①⑥⑤④

B.③④⑥①②⑤

C.⑤③④②⑥①

D.⑤①②④③⑥

题型:单项选择题 A1/A2型题

根据CT工作原理,X线穿过人体后首先被下列哪一部分接收()

A.计算机

B.阵列处理机

C.探测器

D.磁盘

E.照相机

题型:单项选择题 A1/A2型题

阅读理解。

    The more we do a thing, the more we tend to like doing it; and if we do not continue to do it, we feel

uncomfortable. This is called the force of habits, and the force of habits should be fought against.

     Habits, whether good or bad, are gradually formed. When a person does a certain thing, he is driven

by some unseen force to do the same thing repeatedly, then a habit is formed. Once a habit is formed, it

is difficult, and sometimes impossible, to get rid of. It is therefore very important that we should pay great

attention to the formation of habits. Children often form bad habits, some of which remain with them as

long as they live. Older persons also form bad habits as long as they live, and sometimes become ruined

by them.

    There are other habits which, when formed in early life, are of great help. Many successful men say

that much of their success has something to do with certain habits in early life, such as early rising, honesty

and so on. 

    Among the habits which children should not form are laziness, lying, stealing and so on. They are all

easily formed habits. Unfortunately, older persons often form bad habits, which should have been avoided.

    We should keep from all these bad habits, and try to form such habits as will be good for others and

ourselves. Remember: Habits cure habits.

1. _____ are formed little by little.

A. Good habits

B. Bad habits

C. Both good habits and bad habits

D. Neither good habits nor bad habits

2. The underlined word "them" in the first paragraph refers to ______.

A. bad habits

B. good habits  

C. children

D. other persons.

3. Why should we pay much attention to the formation of habits?   

A. Because habits are of great help to every one of us.   

B. Because a man can never get rid of a habit.   

C. Because it's hard and sometimes even impossible to throw away bad habits.

D. Because we are forced to do them again and again.

4. According to the passage, early rising ________.   

A. has something to do with success  

B. is an easily formed habit   

C. is such a habit as should have been avoided

D. is such a habit as will be kept

题型:单项选择题 A1/A2型题

蒙脱石和蛭石是土壤中典型的2:1型膨胀性矿物。

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