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

与表达式职称="教授" OR 职称="副教授"等价的SQL表达式为职称（）（"教授"，"副教授"）或职称（）"%教授"

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）

If the Shipowner relies on an excepted peril，he must（）that the loss or damage was caused thereby.

Developed countries, like the US, have moved the some manufactures to the developing countries. Is it true or not? （）

What should be used to steer an open lifeboat if the rudder becomes lost or damaged?（）

If an operating bilge pump is developing good vacuum, but is unable to discharge any water, which of the following problems is the most probable cause?（）

Civil war or regional conflicts also cause disruption,（）people out of rural areas.

If the scavenge fire is of a more major nature, if there is a risk of the fire extending or if the scavenge trunk is adjacent to the crankcase with risk of a hot spot developing it sometimes becomes necessary to （）the engine.

石油中非烃类化合物主要以含N、S、O的化合物以及含有这些元素的胶状和沥青质的形式存在于石油中。