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【单选题】
S1:The ship ahead of us seems to have reduced its speed. Third mate, what is our distance from the ship?S2:three miles, captain. Her speed is 11 knots. She has slowed down a bit. We are getting closer to her.S1:Roger. Our speed is 12 knots. Let's reduce our speed, too. Bring down the engine revolution to 75RPM.S2:Roger. Engine revolution bringing down to 75 RPM. Speed will be reduced.S1:Roger. Q4:What did the Captain of the speakers' ship?A.
To change the course.
B.
To make a long blast.
C.
To sound fog signal.
D.
To reduce the speed.
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【简答题】按照网络的作用范围来分,可以分成 ____、城域网、____三种。
【简答题】1 When there is a policy of deregulation: a) companies compete freely. b) there are a lot of government controls. c) companies must follow regulations.
【单选题】All companies and manufactures must follow the standards instead of developing new techniques, is a
A.
Disadvantage
B.
Advantage
C.
Protocol