用0.1%苯扎溴铵溶液浸泡金属器械时,为防锈可加入A.4%碳酸氢钠 B.3%碳酸钠 发布时间:2017-05-22 04:43 │ 来源:www.tikuol.com 题型:单项选择题 问题: 用0.1%苯扎溴铵溶液浸泡金属器械时,为防锈可加入A.4%碳酸氢钠B.3%碳酸钠C.5%氢氧化钠D.0.5%亚硝酸钠E.0.5%硝酸钠
题型:单项选择题 I have finished a large part of the book; the rest ____ more difficult. [ ]A. is B. are C. was D. were 查看答案