风湿性心瓣膜病左房室瓣狭窄最重要的体征是

A．二尖瓣面容

B．肺动脉瓣区第二心音亢进

C．心尖区第一心音增强

D．心尖区舒张中晚期隆隆样杂音

E．肺动脉瓣区第二心音分裂

You will pay ______ postage if you send a letter by ordinary mail than by airmail. [ ]

A. even fewer

B. pretty least

C. very little

D. much less