一阶谓词逻辑表示法适于表示什么类型的知识？它有何特点？

—How long have you           the motorbike?  

—For about two weeks. [ ]

A. bought        

B. had    

C. borrowed        

D. lent

(湖北高考)At the meeting they discussed three different ________ to the study of mathematics.

A．approaches

B．means

C．methods

D．ways

The most important thing_____we should pay attention to is the first thing _____I have said.

A．which; that

B．that; which

C．which; which

D．that; that 

入口车流拥堵的情况下，安排人员在自动发卡机处定点驻守，采用入口发放预制卡措施，正常情况下通行能力将提高（）%

A、100

B、200

C、300

D、400

下列哪种情形，机长将被吊扣执照或吊销执照：（）.

A.所驾航空器出现故障

B.所驾航空器坠毁

C.违反有关法规、规定，未对民用航空器实施检查而起飞的

D.低于天气标准降落