When these early migrants arrived in North America, they found the woods and plains dominated by three types of American mammoths. These elephants were distinguished from today's elephants mainly by their thick, shaggy coats and their huge, upward-curving tusks. They had arrived on the continent hundreds of thousands of years before their human followers. The wooly mammoth in the North, the Columbian mammoth in middle North America, and the imperial mammoth of the South, together with their distant cousins the mastodons, dominated the land. Here, as in the Old World, there is evidence that humans hunted these elephants, as shown by the numerous spear points found with mammoth remains.
Then, at the end of the Ice Age, when the last glaciers had retreated, there was a relatively sudden and widespread extinction of elephants. In the New World, both mammoths and mastodons disappeared. In the Old World, only Indian and African elephants survived.
Why did the huge, seemingly successful mammoths disappear? Were humans connected with their extinction.* Perhaps, but at that time, although they were cunning hunters, humans were still widely scattered and not very numerous. It is difficult to see how they could have prevailed over the mammoth to such an extent.
Which of the following conclusions about mammoths does the passage support?
A.Humans hunted them to extinction.
B.The freezing temperatures of the Ice Age destroyed their food supply.
C.The cause of their extinction is not definitely known.
D.Competition with mastodons caused them to become extinct.
第4题
A.千里之行,始于足下:《论语》
B.物以类聚,人以群分:《老子》
C.它山之石,可以攻玉:《诗经》
D.天时不如地利,地利不如人和:《史记》
第5题
()对于司马光相当于《史记》对于()
A.《汉书》班超
B.《论语》老子
C.《春秋》白居易
D.《资治通鉴》司马迁
第6题
路漫漫其修远兮,吾将上下而求索:《离骚》
A. 千里之行,始于足下:《史记》
B. 天时不如地利,地利不如人和:《韩非子》
C. 三军可夺帅也,匹夫不可夺志也:《论语》
D. 有志者,事竟成:《老子》
第7题
路漫漫其修远兮,吾将上下而求索:《离骚》()
A.千里之行,始于足下:《史记》
B.天时不如地利,地利不如人和:《韩非子》
C.三军可夺帅也,匹夫不可夺志也:《论语》
D.有志者,事竞成:《老子》
第8题
对于《史记》相当于 刻舟求剑 对于 ()。A.虚怀若谷 《老子》B.完璧归赵 《吕氏春秋》C.鲲鹏展翅 《庄子》D.任重道远 《论语》
第9题
()对于《史记》相当于刻舟求剑对于()。
A.虚怀若谷《老子》
B.完璧归赵《吕氏春秋》
C.鲲鹏展翅《庄子》
D.任重道远《论语》
第10题
千里之行,始于足下
要求:
A.写成议论文;
B.字数,800~1200字;
C.字迹工整,卷面整洁。
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