When should data be set to disk for safekeeping during the ETL？简述ETL过程中哪个步骤应

For data transmission to be successful，sending and receiving devices must follow a set of

When data（) , it has to be analyzed to decide what it all means.

What should be done when a relative decides to join？A．Try not to be partial.B．Help him to

When used with reversing reduction gears, medium－speed diesel engines should be bolted to

When should people be made to retire？ 55？ 65？ Should there be a com pulsory age limit？

Children should be regularly _____ to great works of art .A.shownB.givenC.exposedD.di