经测定,某居室内重离子与轻离子的比值>50,引起这种情况的污染物,最有可能的是A.C 发布时间:2017-06-27 15:21 │ 来源:www.tikuol.com 题型:单项选择题 问题: 经测定,某居室内重离子与轻离子的比值>50,引起这种情况的污染物,最有可能的是A.COB.SO2C.CO2D.悬浮颗粒物E.NO2
题型:单项选择题 They invented me to their party, ______ is kind of them. [ ]A. thisB. that C. which D. as 查看答案