题目内容

腾空落地的时候容易出现踝关节扭伤

A. 对
B. 错

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Thepurposeofpressurecontrolis to ()

A. determine direction
B. determine speed
C. determine force
D. alloftheabove

I would like to ______(订一张票)for Paris, please.

We have _________(有座位)on fligt leaving Shanghai at 9 o'clock.

Would you prefer first class, business or ________(经济舱)?

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