万用表有红、黑两个表笔,如果位置接反,接错,将会带来测测试错误或烧坏表头的可能性。
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将万用表拨到通断档上,用万用表的红黑表笔测导线的两头,若听到万用表发出“嘀嘀”的声响则表明此导线异常。
A. 对
B. 错
Can you tell me where ______?
A. are they
B. am I
C. she is
D. is she
______ you see where he went?
A. Do
B. Did
C. Are
D. Were
Do you know _______ he is coming?
A. will
B. if
C. what
D. does
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