短渠道的优点是（）。
A.信息通畅
B.企业能集中精力组织生产
C.与中间商关系密切
D.以上都是
参考答案：A
----How beautiful the university is, Professor Wu.
----So it is. I ______ here for four years and my daughter is studying here too.
A. studied B. have studied C. was studied D. had studied
下列不属于肾前性急性肾衰竭的诱因的是（）
A.大量利尿
B.心力衰竭
C.消化道大出血
D.双侧输尿管结石
E.腹泻、呕吐所致脱水
