When should data be set to disk for safekeeping during the ETL?

简述ETL过程中哪个步骤应该出于安全的考虑将数据写到磁盘上？

[单选题]When reassembling the bowl of a disk-type centrifuge, the bowl or locking ring is rotated （）.A . clockwise, due to the bowl rotating clockwiseB . clockwise, due to the bowl rotating counterclockwiseC . counterclockwise, due to the bowl rotating clock

[单选题]In launching a lifeboat，when should the tricing pendants be released?（）.A . Before the boat is lowered from the stowage positionB . As soon as the boat-fall blocks clear the davit headC . After the limit switch is activatedD . After all people have b

[单选题]When _________a hill, the driver should build up speed early in order to cut down gasoline consumption.A． approachedB． to approachC． approachD． approaching

[单选题]When bullying occurs, parents should _____.［A］ help the bulling child get rid of cruelty ［B］ resort to the mediator［C］ avoid getting too protective ［D］ resist the temptation of calling

[单选题]When changing lanes, a driver should use his turning signal to let other drivers know_____ .A． he is entering which laneB． which lane he is enteringC． is he entering which laneD． which lane is he entering

[试题]What attention should be paid when bunkering oil in the USA?

[单选题]Which operation should be done when launching an inflatable liferaft by hand?（）A . Open the liferaft casingB . Turn the valve on the CO2 cylinder to start inflationC . Make sure the operating cord is secured to the vessel before throwing it over the

[单选题]When should you use distress flares and rockets?（）A . Only when there is a chance of their being seen by rescue vesselsB . At half-hour intervalsC . At one-hour intervalsD . Immediately upon abandoning the vessel

[单选题]What should a driver do when ascending?A．) Rise slowly.B．) Breathe faster.C．) Relax completely.D．) Breathe helium.

[单选题]To achieve fluency, when should correction be conducted?A.After class.B.The