问题
选择题
—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
答案
答案：C
与Y相邻，则D的离子
结构示意图是 ；D与E能形成
一种非极性分子，该分子的结构式为 ；D所在族元素的氢化物中，沸点最低的是 。