问答题

在每次进行作业调度时，从后备队列选取的作业个数是由_决定的；而应该选择后备队列中哪些作业调度到内存中则取决于__。

【参考答案】

(1)
多道程序度 (2)
调度算法

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Drivers on me Basmg stoke by-pass used to have their attention diverted by a sign that read A MOMENT'S INATTENTION CAUSES ACCIDENTS. This self-defeating warning has now been removed but its message is still very much to the point. Almost anything can cause an accident. Apart front momentary inattention, it might be a minor miscalculation. Although human error plays its part, it is by no means the only cause of accidents. There must be some causes other titan simple human error. Road construction also plays its part. It is on those roads where there are subtle visual traps. Wherever there is a 'black spot', it means that something is seriously wrong with the toaD.If you have been involved in an accident and have stopped, you must give your name, address , arid registration number to anyone who has a good reason for requesting it; this means anyone affected by the accident, If somebody is injured ,the driver must produce his insurance certificate on request, if these formalities are complied with it is not necessary to wait for the arrival of the policE.It is, however, often wise to do so. The police are expert at drawing plans, taking measurements and photographs and gathering other evidencE.In your absence the police could be given a biased story against you; and yourself might want to point out certain features of the accident to the policE.'A MOMENT'S INATFENTION CAUSES ACCIDENT' is a self-defeating warning because ______.A.it is not trueB.it will distract the driver's attentionC.it is too difficult to understandD.it is too long to be read while driving a car

A.B.
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C.
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D.it
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F.it

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