题目

下列各组离子在无色酸性溶液中可以大量共存的有（ ） A . Ag+、K+、NO3﹣、Cl ﹣ B . K+、Cu2+、SO42﹣、HCO3﹣ C . Mg2+、Cl﹣、SO42﹣、Na+ D . CO32﹣、K+、NO3﹣、Na+ 答案：C  —Mr. Wang is a man of few words, but quick in mind.   —______, you know. A. A single flower does not make a spring B. A man of words and not of deeds is like a garden full of weeds C. A still tongue makes a wise head      D. A great talker is a great liar