采购申请单通过下推式关联按供应商(来源)生成采购订单。()
参考答案:对
I use to play ping-pong a lot in my spare time, but now I am interested in football.
静脉肾盂造影时()首先显影
A.肾实质
B.肾小盏
C.肾大盏
D.肾盂
E.输尿管