Project ______is an uncertain event or condition that，if it occurs，has a positive or a negative effect on at least one project objective，such as time，cost，scope，or quality．

● Project（71）is an uncertain event or condition that, if it occurs, has a positive or a negative effect on at least one project objective, such as time, cost, scope, or quality.（71）

 ______ twice a year, whether it is a car or a bus or a truck, is the rule that every driver must obey in this city.

A vessel or object being towed astern shall display a(n)（）.

The guard, fencing or shielding for moving parts or machinery can be removed for repair only when the machinery it belongs to（）

It will be a relief over the death of a friend or a relative if the friend or relative dies from ______.

How long must GMDSS Radio Logs be retained by the licensee when they relate to a distress situation or disaster? （）

I think you should end it ______ it is too late, or you will be sorry for it.

（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

A salvor may be（）the whole or part of the payment due under Salvage Convention to the extent that the salvage operations have become necessary or more difficult because of fault or neglect on his part or if the salvor has been guilty of fraud or other dishonest conduct.

Vessels must be（）valid certificate of nationality or certificated of registry or license.

Effects which are dutiable or subject to prohibitions or restrictions should be declared in （）.