题目内容

You have to know _____ ins and outs of your industry.

A. the
B. any
C. a
D. /

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She has been concentrating on her ________.

A. careers
B. career
C. a career
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The Prime Minister has, _______________, seen off the challenge of the opposition...

A. the meantime
B. in the meantime
C. at the meantime
D. for the meantime

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A. 输入电源
B. 输出电机
C. 故障输出
D. 输出控制信号

【单选题】西门子MM440通用变频器有________组模拟量输入端子。

A. —
B. 两
C. 三
D. 四