—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

以下是放射性核素的应用技术的是（）

A.脏器功能测定

B.脏器显影

C.体外竞争放射分析

D.脏器示踪技术

E.以上都是