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问题 单项选择题

药物中硒检查法

A．利用氧化还原性的差异
B．利用杂质与一定试剂产生沉淀
C．利用杂质与一定试剂产生颜色反应
D．利用杂质与一定试剂产生气体
E．利用氧瓶燃烧法

答案

参考答案：E

单项选择题


Passage Three
Questions 32 to 35 are based on the passage you have just heard.

A．Because of the beautiful garden in front of it.

B．Because of its old style of architecture.

C．Because it was at the sea side.

D．Because it was the only modern building there.
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单项选择题

我国第一个正式实施的学制是______．

A．壬寅学制
B．癸卯学制
C．壬戌学制
D．六三三学制
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