题目内容

能发生碘仿反应的化合物是 ( )

A. 苯甲醇
B. 甲醛
C. 丁酮
D. 丙酸

查看答案
更多问题

室温下,下列物质分别与硝酸银的氨溶液作用能立即产生沉淀的是( )

A. 已-2-炔
B. 已-1,3-二烯
C. 已-1,4-二烯
D. 已-2,4-二烯

下列化合物中,不能发生银镜反应的化合物是( )

A. 乳糖
B. 蔗糖
C. 麦芽糖
D. 果糖

4. According to Dr Harrison, when we lose a language, we lose a culture's ....

A. important monuments
B. knowledge of the world
C. stories

15 Higher food prices have caused people in the West to:

A. a eat less meat,
B. b not eat in restaurants,
C. c economise on the food they eat.

答案查题题库