Once a very shy boy from a small mountainous village, he a competent engineer in a matter of six years.
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The newspaper refused to the facts the public.
As we sat on the beach the sunshine, she started to tell me her childhood stories.
平面与平面立体相交,其截交线为( )
A. 平面多边形
B. 圆
C. 不一定
We rushed to the railway station, but found the train . (leave)