Many social workers went to Ya’an to help       clean water and food to local people to reduce their pain from the earthquake.

A．put out

B．come out

C．work out

D．give out

男，24岁，风心病，二尖瓣狭窄。辅助检查，左房大，肺静脉压及肺毛细血管压相继升高。该患者属下列哪一期（）

A.左房代偿期

B.左室代偿期

C.右心受累期

D.右室代偿期

E.左房失代偿期