单项选择题

两共顶的圆锥相贯，相贯线为过锥顶的直线段。

A．错误
B．正确
C．都不是
D．都不是

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It is equally important that you value each member's opinion and all [填空1] by capturing what is communicated on paper as you go.

答案： 1、contributions

不定项选择

The methods section usually reports the data from the experiments.

A．正确
B．错误