题目内容

蟾酥中的强心成分为什么不称为强心苷?

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I was speaking to Jane on the phone when suddenly we were .

A. cut off
B. cut down
C. cut back
D. cut out

Peter complained to the owner of the book store that there were some pages in the dictionary.

A. losing
B. missing
C. dropping
D. falling

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