检测报警点指实施有毒气体检测报警的位置(地点).() 发布时间:2019-01-20 08:33 │ 来源:www.tikuol.com 题型:判断题 问题: 检测报警点指实施有毒气体检测报警的位置(地点).()
题型:判断题 (2013·济南一中模拟)—Where ________ Mary have put the empty bottles?—She ________ them away. They must be somewhere.A.can; can't have thrownB.must; needn'tC.must; must have thrownD.can; mustn't have thrown 查看答案