()不能实现中断发动机动力传递。
A. 离合器
B. 差速器
C. 手制动器
D. 变速箱
In dense fog a vessel without operational radar may not be justified()at all but should anchor if it is safe and practicable for her to do so.
A. to be underway
B. on under way condition
C. to stop engine
D. in being under way
Your system performs heavy transaction processing between 8:00 A.M. and 5:00 P.M. but runs batch processing and reports after that. You decide to create a separate resource plan to govern resource allocation for each time period. Which scheduler object will you use to switch automatically between the two resource plans?()
A. Window
B. Program
C. Job_Class
D. Window grou