疾病分布呈散发形式的原因（）

A.该病常年流行

B.隐性感染为主的传染病

C.传播机制难以实现的传染病

D.潜伏期长的传染病

E.以上均包括

— 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