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问题 单项选择题

下面哪个药物易产生幻觉，若被滥用则为毒品，按Ⅱ类精神药品管理

A．恩氟烷

B．丙泊酚

C．盐酸氯胺酮

D．盐酸布比卡因

E．依托眯酯

答案

参考答案：C

单项选择题

100BASE-FX标准使用( )。

A．屏蔽双绞线

B．单模光纤

C．多模光纤

D．同轴电缆
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单项选择题

In The Principles of Language Study (1921), Palmer put forward nine fundamental principles of good language teaching and learning, of which ______ was the first and most important.

A. reinforcement and response

B. habit formation
C. form and meaning


D. meaning and situation
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