问题
单项选择题
为了保证在电路万一出现短路时不致发生事故,最简单有效的办法是在电路中装置()。
A.指示灯
B.开关
C.报警器
D.保险丝
答案
参考答案:D
为了保证在电路万一出现短路时不致发生事故,最简单有效的办法是在电路中装置()。
A.指示灯
B.开关
C.报警器
D.保险丝
参考答案:D
从方框内选择符合的单词或短语,并用其适当形式填空。
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