EA211发动机，正时皮带驱动的部件有（）
A.曲轴
B.凸轮轴
C.水泵
D.机油泵
参考答案：A, B
I am told that the new law will come into _____ on January 1st next year.
A．effect
B．fashion
C．service
D．existence
动态控制战略
