以下（）不属于运输收入。
A.行李运费收入
B.邮运收入
C.行包专列运费收入
D.铁路机车出租费
参考答案：D
山区河流妨碍航行的两大原因？
"What's that? "
"____."[ ]
A. It's milk
B. That is a milk
C. It's a milk
D. That's an milk
