____ will he be back? In a week. [ ] A. 发布时间:2017-07-18 15:16 │ 来源:www.tikuol.com 题型:选择题 问题: ____ will he be back? In a week. [ ]A. How longB. How soonC. How oftenD. How many
题型:选择题 在天平两端的托盘上各放一个质量相等的烧杯,并分别加入等质量、等质量分数的稀硫酸(足量),若往左盘烧杯中放入0.22gCaO,欲使天平平衡,应往右烧杯中加入的物质是( )A.0.36g铝B.0.22gNa2CO3C.0.22gCa(OH)2D.0.24g镁 查看答案