问答题

巴比妥类药物的环状结构中含有( ) ，易发生酮式—烯醇事式互变异构。
芳伯氨基
C. 杂环
D. 双键

A.1，3—二酰亚胺基团
B.

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单项选择题

听力原文：Wasn't Patterson's recent book well received by the public?
(A) No, it will be published next month.
(B) It's a science fiction book.
(C) As far as I know, it didn't sell well.
(22)
A．
B．
C．

A.
(B)
B.
(C)
C.
(22)
A．

后人在泥活字的基础上不断改进，用()和()替代胶泥，使活字印刷术在明清时盛行，
并流传到朝鲜半岛、日本和欧洲。

A.木头
B.石头
C.金属