基础环作为()的基础 A.底环 B.下部密封环 C.蜗壳 D.座环 发布时间:2019-01-16 17:56 │ 来源:www.tikuol.com 题型:单项选择题 问题: 基础环作为()的基础A.底环B.下部密封环C.蜗壳D.座环
题型:单项选择题 Mum, _____ my good friends, Kate and Lucy. [ ]A. she is B. they are C. this is D. these are 查看答案