题目内容

液态光气和异氰酸甲酯等装置要严格控制____混入。

A. 碱液
B. 水
C. 空气
D. 酸液

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It is here ______ I first met her.

A. where
B. which
C. when
D. that

His knowledge of French literature is _____ mine.

A.far superior than
B.far superior to
C.more superior to
D.more superior than

That evening it was George ______ left first.

A. whom
B. who
C. which
D. he

变质岩包括下列()岩石。()

A. 粗面岩
B. 片麻岩
C. 千枚岩
D. 硅岩

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