急性肾小球肾炎的尿特点是（）
A.尿少、比重低
B.尿少、比重高
C.尿多、比重高
D.尿多、比重低
E.尿少、比重正常
参考答案：B
—I can't go with you today. There will be a test tomorrow.
—_____. Maybe next time. [ ]
A. It doesn't matter
B. My pleasure
C. I don't think so
D. Sorry to hear that
销售渠道按其有无中间环节、环节的多少及每一环节含中间商的多少进行划分，分为零阶、一阶、二阶、三阶渠道。（）
