题目

只用一种试剂就可以鉴别乙酸溶液、葡萄糖溶液、蔗糖溶液，这种试剂是（） A . 石蕊试液 B . NaOH溶液 C . Na2CO3溶液 D . Cu(OH)2悬浊液 答案：D —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