题型:问答题 简答题 25℃,在0.01mol•L-1的硫酸溶液中,水电离出的H+浓度是( )A.5×10-13mol•L-1B.0.02mol•L-1C.1×10-7mol•L-1D.1×10-12mol•L 查看答案
题型:问答题 简答题 ________hard you try, it is difficult to lose weight without cutting down the amount you eat. [ ]A. However B. WhateverC. Whichever D. Whenever 查看答案