A、make
B、convenience
C、easy
D、facilitate
第1题:
A.Fixed-lengthgroupsofdigitscalledblocks
B.Individualblocks,oneatatime,withthetransformationsvaryingduringtheencryption
C.Individualdigits,oneatatime,withthetransformationsvaryingduringtheencryption
D.Fixed-lengthgroupsofbitscalledblocks
第2题:
______ it rain tomorrow moring, the loading ______.
A.Should / will be postponed
B.If / shall be postponed
C.Should / would be postponed
D.If / has to be postponed
第3题:
第4题:
________ the vessel have no safety radiotelegraphy certificate at the time of her delivery,she ________ be held to be unseaworthy.
A.If/may
B.Will/shall
C.Should/would
D.Would/should
第5题:
第6题: