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作业的输入方式有哪几种，各有何特点

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Dense snow cover can cause unusually harsh weather patterns to persist. If a severe winter storm blankets the Great Plains, the snow cover reflects the sun’s radiation back into space and thus keeps the temperature of the ground tow. Consequently, cold air moving down from Canada remains cold enough to cause more snowstorms. Which of the following is a conclusion that can be properly drawn from the information above

A. Winter weather on the Great Plains is the product of unusual movements of air masses.
B. The Great Plains are more likely than other areas to suffer unusually harsh weather patterns.
C. If the Great Plains get more snow than usual early in the winter and the snow remains until the spring thaw, the winter is likely to be colder than usual.
D. Even if the temperatures on the Great Plains are not extremely cold but are just below freezing, a moderate snowstorm will probably turn into a blizzard.
E. (E) The temperature of the ground depends primarily on the thickness of the snow cover.

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作业的输入方式有哪几种，各有何特点

作业调度一定要遵循除必要条件以外的以下，3个原则：______、______和______。

对成批进入输入井的作业，根据系统运行并行的道数和一定的规则，以转入井中选取若干作业让它们进入主存，使它们有机会去获得处理器运行，这项工作称______。

批处理作业的管理按照顺序可以分成3个部分：______、______和______。

作业调度一定要遵循除必要条件以外的以下，3个原则：、和__。

批处理作业的管理按照顺序可以分成3个部分：、和__。