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问题 单项选择题

影响增溶的因素不包括

A．增溶剂的种类
B．加入顺序
C．增溶剂的用量
D．增溶剂的分子量
E．药物的性质

答案

参考答案：D

解析：增溶剂的种类、用量与增溶的效果有关，增溶剂的分子量与增溶的效果无关。

问答题 简答题

青春期心理发展的不平衡性有哪些？
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单项选择题

In the following essay, each blank has four choices. Choose the best answer and write-down on the answer sheet.

Microwave communication uses high-frequency (29) waves that travel in straightlines through the air. Because the waves cannot (30) with the curvature of the earth, they can be (31) only over short distance. Thus, microwave is a good (32) for sending data between buildings in a city or on a large college campus. For longer distances, the waves must be relayed by means of "dishes" or (33) . These can be installed on towers, highbuildings, and mountain tops.

31（）

A.transmitted 

B.transformed 

C.converted 

D.delivered
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