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问题 多项选择题

与脑脊液葡萄糖含量有关的是（）

A.血脑屏障通透性

B.氯化物含量

C.血糖浓度

D.蛋白质含量

E.葡萄糖酵解程度

答案

参考答案：A, C, E

问答题

小车在50牛的水平拉力作用下，10秒内在水平面上沿拉力方向匀速前进20米，求：

①拉力所做的功和功率；

②若物体重100牛，求重力所做的功．
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书面表达。
     下面是你英语老师的一些信息，请根据这些信息完成短文。每空一词。
Name Tim Baker
Age Nearly 25
Years of teachingSince 2001
NationalityCanadian
Hobby Reading, history
Her teachingInteresting
Relation with her studentsStrict, kind
Comments Teacher and friend
     Mr 1_____ is our English teacher, who is nearly 25 years old. He comes from 2_____. He has
taught in our school 3_____ 2001. He likes reading and history. All of us love to listen to his class,
for he has a good way to make his lessons interesting. Mr Baker is 4_____ to us but 5_____ with
us in our studies. We think of him not only as a good teacher but also a close friend.
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