Do you know the man_______ glasses?[ ] A 发布时间:2017-06-14 00:33 │ 来源:www.tikuol.com 题型:选择题 问题: Do you know the man_______ glasses? [ ]A. at B. wear C. with D. wears
题型:选择题 法医常用马氏试砷法来证明是否砒霜中毒,原理为:R+8HCl+4Zn═4ZnCl2+3H2O+2As+H2↑(R表示砒霜的化学式),则砒霜的化学式为( )A.As2O3B.As2OC.AsOD.As2O5 查看答案