试题与答案

科学已经发展到这样的地步,当今经济的发展与竞争,已不再主要依靠密集劳动力,如在美国,

题型:单项选择题

题目:

科学已经发展到这样的地步,当今经济的发展与竞争,已不再主要依靠密集劳动力,如在美国,整个信息高速公路工程将耗时20年,总投资达4000亿美元。要为9500万个家庭全部装上大容量光纤线路,要耗资2000亿美元。可见( )。

A.未来的经济发展主要靠高技术

B.未来的经济发展将不再需要劳动力

C.未来的经济发展过程将是一个资本密集的过程

D.在未来的经济竞争中,发展中国家越来越落伍

答案:

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某同学用如图所示的实验装置探究阻力对物体运动的影响.他在水平台面上分别铺上不同材料,让同一小车从斜面上的同一高度由静止滑下,在小车停下的位置分别做上标记a、b、c.

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