在超过()坡度的线路上,确需手推调车时,须经铁路局批准。
A.2.5‟
B.5‟
C.7‟
D.10‟
参考答案:A
按五轮学说,白睛属于()
A.血轮
B.气轮
C.风轮
D.肉轮
E.水轮
There is no ______in pushing children unless they are talented and they enjoy it.
A.wonder
B.need
C.point
D.doubt