诊断尿路结石首选的X线检查是
A．逆行肾盂造影B．静脉尿路造影C．肾动脉造影D．CTE．腹部平片+静脉尿路造影
参考答案：E
-- Why did you leave the fan on in your room? It’s a waste of electricity.
---________
A．I don’t think so, either.
B．Not at all.
C．Sorry, I will turn it off.
D．That’s all right
空气包有哪些作用？充什么气最好？充多少压力为好？
