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【单选题】
气门传动组是从正时齿轮开始至推动气门动作的所有零件,其功用是( )A.
定时驱动气门使其开启
B.
定时驱动气门使其闭合
C.
定时驱动凸轮轴使其转动
D.
定时驱动气门使其开闭
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反馈参考答案：
举一反三
【单选题】What does Jack Marlon probably think of Jessica as a candidate?
A.
She has too much experience for such a position.
B.
She is exactly what they have been looking for a long time.
C.
Her qualities meet their requirement, but a talk with the person is needed for making decision.
D.
She is much below the basic requirement.
【简答题】某系统的进程状态转换图如图所示,请说明: (1)引起各种状态转换的典型事件有哪些? (2)当我们观察系统中某些进程时,能够看到某一进程产生的一次状态转换能引起另一进程作一次状态转换。在什么情况下,当一个进程发生转换3时能立即引起另一个进程发生转换1?
【单选题】What does Jessica like as a hobby?
A.
She loves skiing and swimming.
B.
She loves outdoor activities.
C.
She loves running and reading.
【简答题】某系统的进程状态转换图如图所示 (1)说明引起各种状态转换的典型事件; (2)分析下述状态转换1,2,3,4是否可立即引起其他的状态转换。
【单选题】—________ Li Lei go to school on weekdays? —By bike. [ ]
A.
What does
B.
How is
C.
What time does
D.
How does
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