A.SNTP
B.SMTP
C.HTTP
D.SNMP
第1题:
For data transmission to be successful,sending and receiving devices must follow a set of communication rules for the exchange of information. These rules are known as( ).
A.E-mail B.Intemet C.network D.protocols
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: