烷基硫酸酯属于哪种类型捕收剂()。A、非离子型 B、阳离子型 C、阴离子型 D、两性 发布时间:2017-10-17 11:26 │ 来源:www.tikuol.com 题型:单项选择题 问题: 烷基硫酸酯属于哪种类型捕收剂()。A、非离子型B、阳离子型C、阴离子型D、两性型
题型:单项选择题 Three-fourths of the buildings _____. [ ]a. was destroyedb. is destroyedc. were destroyed d. has been destroyed 查看答案