Of all the students, Peter is ________ to me. [ ]
A. close
B. closer
C. the closest
答案:C
A.4:1
B.1:
C.2:1
D.:1
后滑就是轧件进入轧辊的速度()轧辊在该处线速度的水平分量的现象称为后滑。
A.小于
B.等于
C.大于
D.大于等于