题目内容

【C10】

A. poorest
B. richest
C. common
D. best

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聚乙烯透过太阳辐射能力优于聚氯乙烯,但,聚乙烯保温性能较差,棚内日温差大。()

Many ways have been found______small and simple machine to process large and complicated machine parts.

A. by using
B. to use
C. using
D. used

The new hotel has erected a beautiful building with recreation area and conference facilities on the top floor______the finest view of the city can be obtained.

A. in which
B. over which
C. where
D. there

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