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( 2 ). ( 1 ). ( 3 ). ( 4 ). ( 7 ). ( 5 ). ( 5 ). ( 6 ). ( 7 ). ( 8 ). ( 9 ). ( 9 ). ( 1 ). ( 3 ). ( 7 ). ( 2 ). ( 5 ). ( 6 ). ( 9 ). ( 4 ). ( 8 ). 同一平面内. 不相交. 相 交. 判断对错。. 1、在一个平面内,不相交的两条直线互相平行。( ). 对. 错. 2、两条直线相交,那么这两条直线互相垂直。( ). B. 3 、如图. A. 直线 B 叫垂线。( ).
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