Was it from Mary, _______ was working at a department store, ______ you learned the news?

A．who; who

B．that; which

C．who; that

D．who; which

持续胎儿循环是指（）

A.肺循环压力高于体循环压力

B.肺炎、低氧血症、酸中毒可诱发

C.卵圆孔、动脉导管开放，右向左分流

D.卵圆孔、动脉导管开放，左向右分流

E.紫绀明显，吸氧可缓解