题目内容

车辆在制动过程中,制动力大于粘着力时,车辆容易发生滑行。

A. 正确
B. 错误

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Your Oracle Database 10g is online when you execute the following statement: SQL>ALTER TABLESPACE MY_TABLESPACE FLASHBACK OFF; What is the result of executing this statement if the Flashback Database feature is already enabled in the database?()

A. The database does not record flashback logs for MY_TABLESPACE
B. The tables residing in MY_TABLESPACE are not protected by the Recycle Bin.
C. All the tablespaces except MY_TABLESPACE can be recovered using Flashback Database feature.
D. None of the flashback technologies, such as Flashback Table, Flashback Transaction Query and Flashback Version Query can be used to recover individual rows within the objects from MY_TABLESPACE

某站有尽端式加冰线一条,有效长160m,以14.3m为单位计算,其容车数为()辆。

A. 11
B. 10
C. 12
D. 9

绝缘子在通常情况下,总是有微弱的泄漏电流,经绝缘体流向大地。

A. 正确
B. 错误

建筑石膏最突出的技术性质是凝结硬化快,且在硬化时体积略有膨胀。

A. 正确
B. 错误

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