問題詳情

Many countries have aborigines，and Australia is one of them. Before the first Europeans went to Australia to live, the estimated numbers of aborigines there were over 300,000. Some archeologists indicate that the aborigines have been in Australia 41 • No one knows for sure，but they probably came from the mountains of southern AsiA They were believed to have left there because of 42 , as there were too many people 43 in the areAIt is a long distance from Asia to Australia continent, so how did those aborigines travel there? Scientists think that at one time Australia 44 Asia by a land bridge, and the aborigines possibly traveled south by lanDThen the changes in the Earth’s surface separated Australia from AsiA 45 , the aborigines had been cut off from the rest of the world for thousands of years.
41.
(A) since at least 109000 years
(B) at 10,000 years
(C) for at least 109000 years
(D) for at least 10,000 years ago

參考答案

答案：[無官方正解]
難度：非常困難0
統計：A(0),B(0),C(0),D(0),E(0)

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