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题目内容
（佳木斯大学语言治疗学）
How long has it beesince life appeared ithe earth( )
·30,000 years
·300 millioyears
·2000 millioyears
·5000 millioyears
·30,000 years
·300 millioyears
·2000 millioyears
·5000 millioyears
参考答案
