题目内容

调车人员在车辆运行中，严禁骑、坐车帮、翻越车辆、在（）顶部站立或行走、调整车钩、摘接风管；严禁两人及其以上人员同时站在同一闸台、车梯及机车同一侧踏板上。

A. 平车
B. 棚车
C. 罐车

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国内班期时刻表分为哪两类？

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In Recovery Manager (RMAN), you are taking image copies of the datafiles of your production database and rolling them forward as regular intervals. You attempt to restart your database instance after a regular maintenance task, you realize that one of the data files that belongs to the USERS tablespace is damaged and you need to recover the datafile by using the image copy. You could perform the following steps to accomplish this: 1) Mount the database 2) Take the data file offline 3) Bring the data file online 4) Use the RMAN SWITCH TO command to switch the image copy 5) Apply the archived redo logs 6) Open the database 7) Use the RMAN RESTORE TO command to switch to the image copy Which two options illustrate the correct sequence of steps that you could follow?（） (Choose two.)

A. 2, 6, 4, 5, 3
B. 1, 2, 4, 5, 3, 6
C. 1, 2, 4, 6, 3
D. 1, 2, 7, 5, 3, 6