左心衰时呼吸困难的主要机制是() A.肺动脉高压 B.肺淤血水肿 C.平卧时肺活量↓

题型:单项选择题

问题:

左心衰时呼吸困难的主要机制是()

A.肺动脉高压

B.肺淤血水肿

C.平卧时肺活量↓

D.深睡眠时迷走神经紧张性↑

E.平卧时静脉回流增加

考点:临床医学检验临床血液病理生理学病理生理学题库
题型:单项选择题

阅读短文,选择最佳答案。

      It was October 1st. It was Tom's birthday. He saw a card on the table when he came back home. It

said, " There's a present for you, Tom. Look for it in your room." Tom ran into his room. His parents were

watching him and smiling. On his bed, he saw a new red box. There was a card in the box. He took it out

and read, " Dear Tom, I'm your present. My first letter is in the word pear, but not in bear. My second letter

is in tell, but not in tall, and you can find my last letter in both orange and ink. What am I? " Tom thought hard

and soon smiled, " Aha, I know, Mom. But where is it? " His mother told him it was in his schoolbag and he

found his present in it. What is it? Do you know?

1. Tom's birthday was on ____________.

A. October 2nd

B. October 1st

C. October 3rd

2. Tom saw a box ____________.

A. on his bed

B. on the table

C. on the chair

3. What did he find in the box?  ____________

A. He found a new pen.

B. He found nothing.

C. He found a card.

4. The card in the box told him ____________.

A. what color his present was

B. how much his present was

C. what his present was

5. Tom's present was ____________.

A. a letter

B. a pen

C. a bag

题型:单项选择题

The old woman has two sons, one ______ is a teacher. [ ]

A. of who

B. of whom

C. of which

D. of them

题型:单项选择题

沥青混合料是一种复合材料,由沥青、粗集料、细集料和矿粉以及外加剂所组成。

题型:单项选择题

管理人员的工作包括()。

A、参与管道维修

B、操作管道

C、批准文件

题型:单项选择题

下述哪种药物易出现快速麻醉耐药现象()

A.丁卡因

B.普鲁卡因

C.利多卡因

D.丁卡因

E.布比卡因

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