It is abnormal that when the engine is being turned by the turning gear or by hand, （）.

A notice of readiness is not valid unless it indicates that the vessel is ready to load or discharge as the case may be，at the time（）it is given.

An icebreaker displaying a flag hoist which consists of the code letters “WO” (Whiskey Oscar) is indicating that（）.

A list signal of one white light indicates that the vessel is （）.

A vessel which is being assisted by an icebreaker should indicate that she is ready to cast off the towline by（）.

The important thing is that this is a major breakthrough. “breakthrough” here means an important development or achievement.

One factor that determines the frequency of an alternator is the（）.

For each blank，choose the best answer from the four choices and write down on the answer sheet．(66) is a protocol that a host uses to inform. a router when it joins or leaves an Internet multicast group．(67) is an error detection code that most data communication networks use．(68) is an interior gateway protocol that uses a distance vector algorithm to propagate routing information．(69) is a transfer mode in which all types of information are organized into fixed form. cells on an asynchronous or non -periodic basis over a range of media.(70) is an identifier of a web page.

If the probability that an event will occur is x/4 and x ≠ 0, what is the probability that this event will NOT occur?

The uncertainty of an event is measured by its probability of occurrence and is inversely proportional to that. The more uncertain an event is. The more information is required to resolve uncertainty of that event. The amount of information is measured in （）

Which of the following is an OSPF configuration parameter that is used on an ABR, but not on an internal router？（）

（）generally indicates that a gale or storm is approaching.