搜题请搜索小程序“爱下问搜题”
问题
判断题
涡流式检波器在工作时线圈是运动的。
答案
参考答案：
错
选择题
— What do you think of bacteria, _____ good or bad?
— _____ to say, but one thing is certain: without bacteria, the world would be quite different from what it is.
A. Are they; hard
B. Is it; hardly
C. Is it; hard
D. Are they; hardly
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单项选择题
照明设备要（）检查电源开关是否正常。
A.每周
B.隔一周
C.三天
D.经常
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