题目内容

He’s always talking like that, as if the whole world _____to himalone.

A. had belonged
B. belonged
C. were belonging
D. were belonged

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标注角度的尺寸数字时,要求字体一律按照书写。图样中的任何图线不能穿过尺寸数字,必要时需要将尺寸线。

If my lawyer _ here last Saturday, he _ me from going.

A. had been; would have prevented
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D. were; would have prevented

用圆弧连接两条直线段时,连接圆弧的圆心到直线的距离为 ____。

用圆弧半径为R连接两段圆弧半径为R1与R2,当圆弧与已知圆弧相外切时,连接圆弧的圆心到已知圆弧的距离为;当连接圆弧与已知圆弧相内切时,连接圆弧的圆心到已知圆弧的圆心距为。