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问题 选择题

关于美国农业生产的叙述，正确的是[ ]

A．农业生产多使用小型机械，以适应耕地少、地块小的特点

B．主要作物是咖啡、可可、香蕉和天然橡胶等热带产品

C．农业现代化程度和农业带劳动生产率都比较高

D．农业在国民经济中不占重要地位，但农业投入劳动力较大

答案

答案：C

单项选择题

The Internet is a (66) network of networks which interconnects (67) ranging from the simplest personal computers to the most sophisticated mainframes and supercomputers. This network of networks is used for an extraordinary range of purposes long distance collaborations, retrieving free software and documents, (68) library catalogs, (69) in to supercomputers - the list of current Internet activities and (70) is large and the range of possible future applications is as unlimited as our imagination.

A．database

B．gateway

C．router

D．computers
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填空题

萧涧秋是一个追求精神自由的（）形象。
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