在通讯机房和电子计算机房等防护区,七氟丙烷的喷放时间不宜() A.大于9s B.大于 发布时间:2018-04-13 02:50 │ 来源:www.tikuol.com 题型:单项选择题 问题: 在通讯机房和电子计算机房等防护区,七氟丙烷的喷放时间不宜()A.大于9sB.大于8sC.大于7sD.大于6s
题型:单项选择题 某溶液含硝酸铜、硝酸钡、硝酸银三种溶质.为使上述三种物质分别转化成沉淀,并将沉淀分离出来,现提供三种试剂:①Na2CO3溶液,②盐酸,③NaOH溶液,要求每次只加一种试剂,滤出一种沉淀,则所加试剂的顺序是______. 查看答案
题型:单项选择题 The boss didn’t accept the reason for her being absent for the meeting_________ she didn’t know there was a meeting and __________100yuan from her salary this month.A.why; kept backB.that; kept backC.where; keep outD.because; keep out 查看答案
题型:单项选择题 中央人民广播电台记者针对郑州经济适用房用地被偷换用途一事,对郑州市规划局局长逯军进行采访。这一记者依法行使监督权的方式是( )A.人大代表联系群众B.舆论监督制度C.信访举报制度D.监督听证会方式 查看答案