The river______ surface used to be covered with waste and rubbish is now taking on a new look.

A．of which

B．along with

C．where

D．whose

男性，36岁，心悸、胸痛，劳力性呼吸困难3个月。胸骨左缘第3、4肋间收缩期喷射性杂音，心界不大，超声心动图舒张期室间隔的厚度与左室后壁之比为1．35。最可能的诊断是（）

A.风心病二尖瓣狭窄

B.风心病二尖瓣关闭不全

C.风心病主动脉瓣关闭不全

D.风心病主动脉瓣狭窄

E.肥厚型心肌病