I borrowed a book from the _______ yesterday.
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The boy wants to take the _______ course next term.
If you had worked harder, you would have got an A in _______ Li’s course.
1、单片机应用系统常用的蜂鸣器（电磁式蜂鸣器）有哪两种，特点如何?
风景名胜区道路交通规划需要调查的内容有（）
A. 与交通有关的经济调查和分析
B. 交通现状调查
C. 交通需要调查
D. 停车调查
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