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问题 选择题

— ____________ pens do you need?

— Sixty. [ ]

A. How many

B. How old

C. How much

答案

答案：A

选择题

Hardly ______ he got out of the court ______ the reporters raised a lot of questions to him．

A．had … when

B．had…than

C．did…when

D．has…than
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单项选择题

与机体酸碱平衡有密切关系的是（）.

A.Na+

B.K+

C.Ca2+

D.Cl-

E.HCO3-
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