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It may be necessary to stop（）(每隔一定时间) in the learning process and go back to the difficult points in the lessons.
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更多 “It may be necessary to stop（）(每隔一定时间) in the learning process and go back to the difficult points in the lessons.” 相关考题
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A．by that? ?
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单选题Before the first non-stop flight made in l949, it ______ necessary for all planes to land for refueling.A
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has beenC
had been D
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单选题During the project, requirements change for a variety of reasons. As needs change and as work proceeds, additional requirements are derived and changes may have to be made to the existing requirements. It is essential to manage these additions and changes efficiently and effectively. To effectively analyze the impact of the changes, it is necessary that the source of each requirement is known and the rationale for any change is documented. The project manager may, however, want to track appropriate measures of requirements volatility to judge whether new or revised（）are necessary.A
proceedingsB
controlsC
forecastingsD
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单选题What is the danger associated with stopping a running job by using the STOP_JOB procedure？（）A
The job will need to be reenabled before it will execute again.B
The job may hold locks on objects referenced within it.C
All jobs within the job group will also be stopped.D
The job may leave data in an inconsistent state.E
There is no danger in using the STOP_JOB procedure.
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add refrigerantD
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单选题The court may reduce or deny remuneration if it appears that the salvors have by their fault （）or have been guilty of theft，receiving stolen goods，or other acts of fraud.A
given the necessary salvage or assistanceB
given the salvage or assistance necessaryC
rendered the necessary salvage or assistanceD
rendered the salvage or assistance necessary
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单选题Before the first non-stop flight made in 1949, it _____ necessary for all planes to land for refueling.A
would beB
has beenC
had beenD
would have been
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