(a+b)×c=[ ] A.a×c+b×c B.a×c×b×c C.a×b×c× 发布时间:2017-04-17 08:14 │ 来源:www.tikuol.com 题型:选择题 问题: (a+b)×c=[ ]A.a×c+b×c B.a×c×b×c C.a×b×c×b