【pz_填空】center has been set up to give【pz_填空】on scientific farming for the nearby farmers.（）

In modern fathometers the sonic or ultrasonic sound waves are produced electrically by means of a(n)（）.

A vessel proceeding along the bank of a river or channel has the tendency to（）.

The machine he originated and perfected has no modern _____ or ancient prototype.

It has been decided that a collision due to any cause other than the negligence of the Shipowner or his servants is within the scope of（）.

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．

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.

Once vessel has been cleared by Port Health or Immigration （）must proceed to appropriate berth or anchorage．

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.

兰州军区在西安邮电大学设立哪个奖学金，奖励立志国防建设的学子？（）