题目内容

盐酸普鲁卡因具有的性质为()。

A. 与芳醛缩合成席夫碱
B. 具重氮化-偶合反应
C. 羟胺侧链具碱性
D. 具有酯键可水解
E. 具有芳伯氨基

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盐酸利多卡因在酸性溶液中与氯化钴试液反应，生成亮绿色的细小钻盐沉淀

A. 对
B. 错

The first paragraph of the parents’ letter has a_________

A. tragic tone.
B. prideful tone.
C. pleading tone.

In its third paragraph, the parents’ letter takes on a _______

A. distressed tone.
B. revengeful tone.
C. doubtful tone.

The parents’ letter ends in a(n) ________

A. instructive tone.
B. bewildered tone.
C. sentimental tone.