控制油压力低于(),润滑油泵自启动。
A.≤0.3MPa
B.≤0.4MPa
C.≤0.5MPa
D.≤0.6MPa
参考答案:D
How happy we are ______ each other here away from home! [ ]
A. seeing
B. to see
C. seen
D. meeting
遇到这种情况不能超车。