便捷插座设置在400V三相电网的()A.一个单相和中性线之间 B.两个单相之间 C. 发布时间:2019-12-11 20:08 │ 来源:www.tikuol.com 题型:单项选择题 问题: 便捷插座设置在400V三相电网的()A.一个单相和中性线之间B.两个单相之间C.一个单相和地之间D.中性线和地之间
题型:单项选择题 At the conference, political leaders from many countries promised to work together to defend the world _____ terrorism and other threats. [ ]A. for B. without C. beyond D. against 查看答案