轧机的压下系统主要控制轧件的（）。
A.速度
B.厚度
C.温度
D.长度
参考答案：B
As time____, you'll come to think of English as your friend and love it.
A．goes by
B．runs out
C．takes off
D．turns up
可耗气伤津，挟湿的邪气是（）
A．风
B．寒
C．暑
D．湿
E．火
