夜间行车,要尽量避免超车,确需超车时,可变换远近光灯向前车示意。
参考答案:对
He looked around and caught a man _______ his hand into a pocket of a passenger.[ ]
A. put
B. to be putting
C. to put
D. putting
在正常情况下,液压系统的油温应控制在()。
A.4摄氏度
B.15摄氏度以上
C.0摄氏度左右
D.4摄氏度以下