发动机启动时，无机油压力时应该（）。
A.立即停机
B.加注机油
C.低速运转
参考答案：A
Look out! That truck _____ you!Thanks for warning me![ ]
A. will hit
B. was hitting
C. is going to hit
D. hits
怎样利用沼液种芦荟？
