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简述研究报告的撰写步骤

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超声波传感器既可以测距离，还可以进行无损检测。

A. 对
B. 错

I’ve come to___________ you up.

A. check
B. help
C. pick
D. take

Let me help you________ in at the reception desk.

A. check
B. help
C. pick
D. take

Here are the_________ of today and tomorrow.

A. time
B. schedules
C. things
D. table