题目

复数的虚部是(    ) A.          B.            C.              D. 答案::B. 解析:: 复数的除法,相当于根式中的分母有理化,属于简单运算.12.What is she anxious(焦虑) about?A.Falling behind others.B.Waiting in line.C.She doesn't know.
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