There is              rice in the room,     [ ]

A. much too                    

B. many too    

C. too many                    

D. too much

重度二尖瓣狭窄病人最重要的体征是（）

A、心尖区第二心音亢进

B、二尖瓣面容

C、二尖瓣开瓣音

D、心尖区低调的隆隆样杂音

E、肺动脉瓣区第二心音亢进