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张力计辊由于长期磨损导致测量不准确时，应（）。

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地域不同，扦插时期也不相同，正确的叙述是（）。

A. 落叶树的扦插应在秋季落叶后进行
B. 春季扦插应在芽萌动后扦插
C. 北方干寒地区或冬季少雪的地区，春季扦插时插穗易遭风干的冻害所以只能在夏秋季节扦插
D. 一年四季都可以扦插

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在正常情况下，电动机允许在冷状态下启动的（），每次间隔时间不得小于（），允许热状态下启动（）。

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An application writes to a log file in the /logs filesystem that is full. After the log file is deleted, 'df' still shows the filesystem as 100% full. What is the likely cause of the problem and what will resolve it?（）

A. The deleted file is still open by the application.The system must be rebooted before'df' will show the reduction in the filesystem.
B. The deleted file is still open by the application.The application must be stoppedbefore 'df' will show the reduction in the filesystem.
C. The filesystem is still marked as full in the /etc/fs.status file.The system must be rebooted before 'df' will show the reduction in the filesystem.
D. The filesystem is still marked as full in the /etc/fs.status file.The application must be stopped before 'df' will show the reduction in the filesystem.

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不属于历史分析法的特点的是（）

A. 丰富性
B. 直观性
C. 具体性
D. 本质性

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