Sally  shouted with joy when she knew she won the first.

A．happiness

B．illness

C．surprise

D．difficulty

下列哪种情况下不易出现发绀()。

A．肺心病心力衰竭

B．严重贫血

C．重度一氧化碳中毒

D．先天性心脏病

E．急性呼吸道阻塞