The first edition             in 1955 and         a best seller ever since.

A．was published; had been

B．had been published; had been

C．has been published; has been

D．was published; has been

某婴，孕34周分娩。生后2小时起出现青紫、呼吸困难，至6小时更加重，出现三凹征。为明确诊断，考虑应进行较有意义的辅助检查是（）

A.动态监测血气分析

B.测定血清磷脂成分

C.抽取胃液进行胃液震荡实验

D.胃液或气管抽吸物作涂片染色查找嗜咿红透明膜

E.X线胸片检查