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问题 选择题

— ____ enjoyable it is to travel by air!     

— ____. [ ]

A. How; So is it

B. How; So it is

C. What; So is it

D. What; So it is

答案

答案：B

选择题

I'd like to study law at university ________ my cousin prefers geography.    [ ]

A. though        

B. as

C. while              

D. for
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单项选择题

正常成人二尖瓣口面积为（）

A.1～2cm2

B.2～4cm2

C.4～6cm2

D.6～8cm2

E.2～3cm2
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