正常人群中,多普勒超声显示的血流速度受呼吸运动影响最大的是() A.上、下腔静脉 B

题型:单项选择题

问题:

正常人群中,多普勒超声显示的血流速度受呼吸运动影响最大的是()

A.上、下腔静脉

B.左、右肺静脉

C.二尖瓣口

D.三尖瓣口

E.肺动脉瓣口

考点:广西儿外科住院医师规范化培训B超B超题库
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甲酵母菌进行发酵,乙酵母菌进行有氧呼吸,若它们消耗等量的葡萄糖,则甲、乙酵母菌释放出的二氧化碳的体积比是[     ]

A.3:1

B.2:1

C.1:3

D.1:6

题型:单项选择题

门脉高压症最凶险的并发症是()

A.感染

B.肝性脑病

C.贫血

D.大出血

E.低蛋白血症

题型:单项选择题

阅读理解。

     It doesn't come as a surprise to you to realize that it makes no difference what you read or study if you

can't remember it. You just waste your valuable time.   1   One dependable aid that does help you remember

what you study is to have a specific purpose or reason for reading.

     Why does a clerk in a store go away when your reply to her offer to help is, "No, thank you. I'm just

looking."? Both you and she know that if you aren't sure what you want, you are not likely to find it. But

suppose you say instead, "Yes, thank you.I want a pair of sun glasses." She says,"Right this way, please." 

        2   If you choose a book, "just looking" for nothing in particular, you are likely to get just that-nothing.

But if you do know what you want, you are almost sure to get it.Your reasons will vary; they will include

reading or studying"to find out more about", "to understand the reasons for" and"to find out how". 

      3   Before you start to study, you say to yourself something like this, "I want to know why Stephen

Vincent Benet happened to write about America". Because you know why you are reading or studying, you

relate the information to your purpose and remember it better. 

       4   At least two important processes go on at the same time. As you read, you take in ideas rapidly and

accurately. But at the same time you express your own ideas to yourself as you react to what you read. You

have a kind of mental conversation with the author.

     This additional process of thinking about what you read includes evaluating it, relating it to what you

already know, and using it for your own purposes.    5  One part of critical reading, as you have discovered,

is distinguishing between facts and opinions. Facts can be checked by evidence, Opinions are one's own

personal reactions.Another part of critical reading is judging sources.Still another part is drawing accurate

inferences.

A. Maybe you have already discovered some clever ways to keep yourself from forgetting.

B. It is important for students to have a positive attitude to their study.

C. You remember better when you know what you' re reading.

D. In other words, a good reader is a critical reader.

E. It's quite the same with your studying.

F. Reading is not one single activity.

G.This is the way it works.

题型:单项选择题

数字电路可分为哪两大类?它们的基本单元和常用电路分别有哪些?

题型:单项选择题

我们党从建立之日起,就是以中国()的代表姿态而登上历史舞台的。

A、先进文化

B、先进生产力

C、先进意识形态

D、先进生产关系

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