题目内容

12 do you suppose he asked for them?

A. What
B. How
C. Who
D. Which

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在井筒内用罐笼运送乳化炸药时,罐笼的升降速度不得超过()m/s。
A 1
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A. clever
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A 1
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He 10 his head and pointed to the two fingers

A. nodded
B. raised
C. shook
D. turned

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