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问题 单项选择题

A．气体的扩散速率 B．气体的扩散系数
C．肺的扩散容量 D．通气/血流比值
E．气体分压

肝脏不能完成的功能

答案

参考答案：B

补全对话，情景问答
根据所给句子，选择适当的应答语。每个选项只能用一次。
( )1.  What are you supposed to do when you meet a new person in China?
( )2.  What's the thing we need to get every night?
(     )3.  How have you changed since 2009?
( )4.  I have some questions about your school.
( )5.  A giant panda weighs 120 kilos.
A. It's sleep.
B.  I think l become more confident.
C. We're supposed to shank hands.
D. We'd better bow each other.
E.  Yes, lt's much heavier than a cat.
F.Oh, what do you want to know?
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多项选择题

甲、乙两质点沿同一直线做匀加速直线运动的v-t图象如图所示，3s末两质点在途中相遇。则（）

A.甲质点加速度大于乙质点加速度

B.甲质点加速度小于乙质点加速度

C.出发前乙在甲之前4m

D.出发前甲在乙之前4m
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