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Certain species disappeared or became extinct___________________(是由于产生了新物种形式,它们可以更好地适应当时不断变化的地球环境)
Certain species disappeared or became extinct___________________(是由于产生了新物种形式,它们可以更好地适应当时不断变化的地球环境)
admin
2010-06-11
49
问题
Certain species disappeared or became extinct___________________(是由于产生了新物种形式,它们可以更好地适应当时不断变化的地球环境)
选项
答案
Certain species disappeared or became extinct as new forms arose that were better adapted to the Earth’s changing environment./...when new forms arose that were better adapted to the Earth’s changing environment.
解析
一些物种消失或灭绝,是由于产生了新的物种形式,它们可以更好地适应当时不断变化的地球环境。
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0
大学英语六级
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