-Is that your backpack. -No. It's backp 发布时间:2017-06-17 23:03 │ 来源:www.tikuol.com 题型:选择题 问题: -Is that your backpack.-No. It's backpack.[ ]A. my B. he C. his D. she
题型:选择题 Al2(SO4)3的电离方程式为( )A.Al2(SO4)3=Al6++SO46-B.Al2(SO4)3=Al23++(SO42-)3C.Al2(SO4)3=2Al3++3SO42-D.Al2(SO4)3=2Al3++3S6++12O2- 查看答案