A.back
B.black
C.backdown
D.backup
[单选题]F.iles can be lost or destroyed accidentally. Keep(74) copies of all data on removable storage media.A.moveB.pasteC.backdownD.backup
[单选题]F.iles can be lost or destroyed accidentally.Keep (74) copies of all data on removable storage media.A.backupB.backC.blackD.backdown
[单选题]F.iles can be lost or destroyed accidentally. Keep(74)copies of all data on removable storage mediA.A.backupB.backC.blackD.backdown
[单选题]F.iles can be lost or destroyed accidentally.Keep ______ copies of all data on removable storage media.A.backupB.backC.blackD.backdown
[单选题]I can’t find the key ______the door. Maybe I lost it.A.toB.ofC.withD.for
[单选题]I can't find the key _____the door. Maybe I lost it.A.to B.of C.with D.for
[单选题]I can’t find the key to my office. I _____have lost it on my way home.A.wou
[单选题]Nature is very easily destroyed by __.A. rich peopleB. poor peopleC. natural disastersD. mankind
[单选题] GIF files are limited to a maximum of 8 bits/pixel, it simply means that no more than 256 colors are allowed in (74) .(74)A. an image B. a file C. a window D. a page
[单选题]McKay’s flying documents were destroyed in .A. Belgium B. Germany C. Canada D. England