已知z∈三,则命题“z是纯虚数”是命题“z2r-z2∈R”的______条件. 发布时间:2017-04-15 15:14 │ 来源:www.tikuol.com 题型:填空题 问题: 已知z∈三,则命题“z是纯虚数”是命题“z2r-z2∈R”的______条件.
题型:填空题 A lot of people in this country will face ______ as a result of the earthquake.[ ]A. starvation B. extinction C. regulation D. identification 查看答案