---Would you like a cup of tea?

---        .

A．Yes, OK

B．I think so

C．That’s all right

D．No, thanks

下列哪些先天性心脏病属于潜伏青紫型()

A．动脉导管未闭

B．大血管转位

C．房间隔缺损

D．肺动脉狭窄

E．室间隔缺损