2. 考研
  3. The invention of both labor-saving tools and tools of intelligence is rarely accidental. Instead, it is usually the product of h

The invention of both labor-saving tools and tools of intelligence is rarely accidental. Instead, it is usually the product of h

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问题      The invention of both labor-saving tools and tools of intelligence is rarely accidental. Instead, it is usually the product of human need; (21) is truly the mother of invention. People usually devise tools to (22) for natural deficiencies. For example, people invented weapons to defend (23) from physically superior (24) . But (25) is only one incentive for inventions. People also invent (26) tools to (27) certain established tasks more efficiently. For instance, people developed the bow and arrow from the (28) spear or javelin in order to shoot (29) and strike with greater strength.
    (30) civilizations developed, greater work efficiency came to be demanded, and (31) tools became more (32) . A tool would (33) a function until it proved (34) in meeting human needs, at which point an improvement would be made. One impetus for invention has always been the (35) for speed and high-quality results--provided they are achieved (36) reasonable costs. Stone pebbles were sufficient to account for small quantities of possessions, (37) they were not efficient enough for performing sophisticated mathematics. However, beads arranged systematically evolved into the abacus. The (38) of this tool can be (39) to the development of commerce in the East around 3000 B.C., and the abacus is known (40) by the ancient Babylonians, Egyptians, Chinese, etc.

选项 A、tackle
B、perform
C、operate
D、facilitate
答案B
解析 本题测试词义搭配。tackle意为“解决，处理”，一般指解决难题或问题；perform意为“完成，执行”，指完成所保证或希望的事情，一般指完成任务；operate意为“操作，运作”，指操作仪器设备；facilitate意为“使便利，使容易”。所填之词的宾语是certain established tasks(某些既定任务)，所以应该选B。
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