题目内容

加热炉设计中,需计算推钢比的加热炉是斜底式加热炉。

A. 正确
B. 错误

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飞机在地面,只有电瓶供电的情况下,按压冲压涡轮和应急发电机人工按钮(RAT&EMER GEN MAN ON)时:()

A. 冲压涡轮会放出,但应急发电机不工作;
B. 什么都不会发生
C. 冲压涡轮只能在空中放出,不会在地面放出,但应急发电机工作;
D. 冲压涡轮放出且应急发电机工作。

Which statements describe guaranteed behavior of the garbage collection and finalization mechanisms?()

A. Objects are deleted when they can no longer be accessed through any reference.
B. The finalize() method will eventually be called on every object.
C. The finalize() method will never be called more than once on an object.
D. An object will not be garbage collected as long as it is possible for an active part of the program to access it through a reference.
E. The garbage collector will use a mark and sweep algorithm.

土壤酸碱性对土壤养分有效性有何影响?

在()时期出现了私学兴盛,百家争鸣的学术繁荣。

A. 春秋时期
B. 秦汉时期
C. 隋唐时期
D. 上古时期

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