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  3. Technological invention has directly or indirectly produced social change in

Technological invention has directly or indirectly produced social change in

游客2023-07-24  43
问题     Technological invention has directly or indirectly produced social change in every period of history. The invention of the horse collar in the Middle Ages was a【B1】______technological advance for agriculture; the【B2】______for use at sea so【B3】______navigation in the fifteenth  century that it led in the age of【B4】______; and the steam engine was an【B5】______factor in the industrialization of Europe in the nineteenth century.
    A discovery is another kind of technological【B6】______. While inventions add something  new to a culture, discoveries increase our knowledge of something that already exists. Gravity had always been there, but Newton "discovered" it: be【B7】______how this natural force worked and how its laws【B8】______to falling bodies. This knowledge made possible many new inventions.【B9】______.
    Since each invention makes more inventions possible, the speed of technological development tends to accelerate.  Benjamin Franklin experimented with electricity in the eighteenth century,【B10】______. In the hundred years since Edison invented the light bulb, the discovery  of electricity has led to tens of thousands of inventions, from the internal burning engine to the computer.【B11】______pose some of tile greatest challenges of our time. [br] 【B8】
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解析 动词，apply to 固定词组“将…应用于”。
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