题目内容

It worried her a bit_____ her youngest son had caught a cold.

A. what
B.if
C.while
D.that

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______he said at the meeting surprised everyone present.

A.That
B. What
C. The fact
D.The matter

Musictherapyisusefulinrelievingstressandotherconditions.

Manypregnantwomencarryafetus(胎儿)withadifferentbloodtypefromtheirown.

斜齿轮尺寸计算时按照法面参数计算

A. 对
B. 错

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