题目

若a、b为空间两条不同的直线,、为空间两个不同的平面,则a的一个充分条件是(     ) A.a∥且     B.a且       C.ab且b∥     D.a且∥ 答案:D—Is that ______ volleyball?—Yes. Bill likes playing ______ volleyball. ______ volleyball is his.A.the; a; /B./; the; / C./; the; TheD.a; /; The
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