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问题 填空题

学校组织郊游，善于观察的小文看到汽车上显示速度和路程的表盘上指针位置几乎不动，示数如图甲所示．汽车行驶了一段时问后，表盘示数变为图乙所示，那么这段行驶时间为____________h．

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0.5

填空题

根据句意填单词。

     Look at the p__1__. It's a picture o__2__ a classroom. W__3__ can you see i__4__ the classroom?

I can see a b__5__ desk in the front of the classroom. Some books are o__6__ the desk. What other

things can you see on the teacher's desk? I can see two white b__7__. There is some chalk i__8__ them.

Where a__9__ the brooms? They are b__10__ the door.
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单项选择题

关于林可霉素的描述错误的是（）

A.林可霉素的吸收受进食的影响

B.药物吸收后在骨和胆汁中分布较高

C.林可霉素的半衰期较克林霉素短

D.口服吸收量较克林霉素小

E.不能透过正常的血脑屏障
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