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问题 多项选择题

人类对于异烟肼的代谢速率有明显的个体差异，在慢代谢型可表现为（）

A.血药浓度高

B.血浆半衰期延长

C.较易出现周围神经炎

D.尿中乙酰化异烟肼较多

E.显效较快

答案

参考答案：A, B, C, E

解析：ABCE异烟肼用于治疗慢代谢型人群时，由于乙酰化过程受阻，可导致血浆半衰期延长，血药浓度高，由于血浆半衰期延长，使药物显效加快，但同时药物的不良反应增加。

填空题

如图所示，水平面上放有质量均为m=1kg的物块A和B（均视为质点），A、B与地面的动摩擦因数分别为μ1=0.4和μ2=0.1，相距L=0.75m．现给物块A一初速度v0使之向物块B运动，与此同时给物块B一个F=3N水平向右的力使其由静止开始运动，取g=10m/s2．求：

（1）物块B运动的加速度大小；

（2）若要使A能追上B，v0应满足什么条件？
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完形填空
下面是四位同学写给编辑Lee的求助信,请将这四封信与问题进行配对.
A
Dear Editor Lee,
I am a student from a junior middle school. I am good at all the subjects except English. I can’t remember words well. I am especially weak in speaking and listening. What shall I do? Could you give me some advice?
John
                              B
Dear Editor,
I have a problem! I really don’t know what to say when I meet strangers. I find it hard to talk with others because I’m afraid they might laugh at me. I am not as interesting, clever or funny as my friends. If people start talking to me, they will realize that I am just boring. Please help me.
Ann
                             C
Dear Editor Lee,
I was getting on well with my best friends. But a few days ago, another friend of mine told me that she often said bad words about me. When I heard this, I was very angry. What should I do? Should I stop being her friend or stay with her as usual?
Betty
                             D
Dear Editor Lee,
Recently I have much difficulty in falling asleep. When I go to bed, though I feel very sleepy, I always think a lot and can’t fall asleep. So I always feel very tired in class and sometimes my head hurts badly. Could you give me some advice?
Steven
小题1:The student finds it difficult to fall asleep.
小题2:The student doesn’t know what to say to strangers.
小题3:The student doesn’t know how to learn English well.
小题4:The student doesn’t know if she should still stay with her best friend.
小题5:请写出你的一个烦恼：________________________________________
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