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  3. During the past 200 years, the world population has increased 6 times, the annua

During the past 200 years, the world population has increased 6 times, the annua

游客2023-10-09  82
问题 During the past 200 years, the world population has increased 6 times, the annual world output has increased 80 times, and the distance a person can travel has gone up 1000 times. There has also been much recent progress in art, culture, learning, and sci
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答案 在过去的200年时间里．世界人口增加了六倍，世界平均产量则增加了80倍，可供人们旅游的路线增加了1000倍，美术、文化、学术及科学等领域最近也分别取得了较大进步。
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