A.appeal
B.pledge
C.proclaim
D.urge
[问答题]Without water, there is no life on the earth.
[单选题]Many kinds ofanimals have [vanished] from the earth.A.developedB.disappeare
[单选题]Water is very important to living things. Without water there can be(1)life
[单选题]Water is very important to living things. Without water there can be(1)life
[单选题]Water is very important to living things. Without water there can be(1)life
[单选题]Water is very important to living things. Without water there can be(1)life
[单选题]Water is very important to living things. Without water there can be(1)life
[名词解释] 防护(protection against)与保护(protection for)
[单选题][A] able better to[B] able to better[C] better to able[D] better able to
[单选题] (73) are essential for the protection of data.(73)A. MemoryB. BackupsC. FilesD. Blocks