废气分析时第一吸收瓶吸收()。 A.O2 B.CO C.CO2 发布时间:2019-01-22 11:55 │ 来源:www.tikuol.com 题型:单项选择题 问题: 废气分析时第一吸收瓶吸收()。A.O2B.COC.CO2
题型:单项选择题 The settlement is home to nearly 1,000 people, many of _____ left their village homes for a better life in the city. [ ]A. whom B. which C. them D. those 查看答案