酶的催化高效性是因为酶()。A.启动热力学不能发生的反应 B.能降低反应的活化能 C

题型:单项选择题

问题:

酶的催化高效性是因为酶()。

A.启动热力学不能发生的反应

B.能降低反应的活化能

C.能升高反应的活化能

D.可改变反应的平衡点 考试大论坛

E.对作用物(底物)的选择性

考点:临床执业医师2003年临床执业医师第二单元真题
题型:单项选择题

任务型阅读(10分)

It is very important to have good friends. 1)拥有许多朋友的一种生活是有趣且丰富多彩的。A life without a friend is a life without a sun.2)Having good       can       us in lots of different ways. People with a lot of friends usually feel happier than people with no friends. Everything we do will be more fun if we have friends with us to share our adventures(经历). When we are feeling sad or worried, our friends will give us advice and help us out of difficulties.

We should not only have good friends but also be good friends. We need our friends as much as they need us. We should be willing to help friends when they need help.

1. 回答下面问题

What will friends do when we are feeling sad or worried?

                                                                   

2. 在2)句的空白处填入适当的词使句意完整、上下文通顺:                

                                                                     

3. 将1)句译成英语:____________________________________________________

4. 写出文中与下列句子意思相近的句子:

If friends need our help, we should be glad to help them.

_____________________________________________________________________

5. 找出文中最能表达该短文主题的句子:                                

______________________________________________________________________

题型:单项选择题

某40岁患者,心动过速病史5年,半小时前突感心悸。查体:心率182/min,心尖部闻及双期杂音。肝肋下3.0cm,双下肢水肿。ECG示一系列快速规则的QRS波群,形态正常,无明确P波可见。根据上述情况,首选用药是

A.维拉帕米静注
B.普罗帕酮静注
C.利多卡因静注
D.毛花苷C静注
E.胺碘酮静注

题型:单项选择题

按照(),犯罪客体分为一般客体、同类客体和直接客体。

A.犯罪行为的多少

B.犯罪行为侵犯具体社会关系的次数多少

C.犯罪所侵犯的社会关系的范围大小

D.犯罪所直接侵犯具体社会关系的多少

题型:单项选择题

接诊时,如出现以下症状,哪项最具特征性

A.严重口渴,多饮多尿
B.昏迷
C.呼吸深大
D.呼气有烂苹果味
E.皮肤干燥,弹性差

题型:单项选择题

()的肠系淋巴组织已经类似于哺乳动物的黏膜淋巴组织(MALT)

A.蛙

B.虾

C.蟹

D.鱼

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