题目内容：
熔断器是 。A.保护电器
B.开关电器
C.继电器的一种
D.主令电器
参考答案：
选择题：熔断器是 。
- 题目分类：电气控制及PLC
- 题目类型：选择题
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A.保护电器
B.开关电器
C.继电器的一种
D.主令电器
A.保护电器
B.开关电器
C.继电器的一种
D.主令电器
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I think____ important to learn English well.( )(本题3.0分) A、 this B、 that C、 it
He tried to stand on his hands for five minutes, _
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极限 lim x→1 x2-2x+1/x2-1=( ) [ 2 分 ] A. 0 B. 1 C. 2
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１１．简述疏忽大意过失的特征。
１１．简述疏忽大意过失的特征。