下列哪种清洁剂属于酸性清洁剂()。 A.高泡洗地毯剂 B.玻璃清洁剂 C.起蜡水 D 发布时间:2017-08-12 08:24 │ 来源:www.tikuol.com 题型:单项选择题 问题: 下列哪种清洁剂属于酸性清洁剂()。A.高泡洗地毯剂B.玻璃清洁剂C.起蜡水D.“八四”消毒液
题型:单项选择题 By the time Jack returned home from England, his son ________ from college.[ ]A. graduated B. has graduatedC. had been graduating D. had graduated 查看答案