吹灰器吹灰也可能反而引起管子腐蚀或刷蚀，其原因不包括（）。

A．吹灰气体中有凝水

B．吹灰次数过于频繁

C．气流速度过高

D．气流温度过高

Some people hold that the more conservative the world becomes, ______ have old furniture, old houses and old paintings.

A. the smarter is to


B. the smarter it is to
C. is it the smarter so

D. is one to the smarter