更多"Passage One
Animal life first "的相关试题:
[单项选择]Passage One
Animal life first appeared on the earth about 400 million years ago. Through the passing millennia, thousands of animal species have come and gone. Until recently, this process was gradual, the result of changes in climate, in habitat, or in the genes of the animals themselves. But the tremendous expansion of modern civilization now threatens to upset this natural balance, putting unprecedented pressure on the survival of our wildlife.
Of all the continents, the most drastic reduction in wildlife has occurred in North America, where the transition from a rural to a highly industrialized society has been most rapid. Among the victims are birds, mammals, and fish. We will never again see the passenger pigeon or the eastern elk. They have been wiped out. Of many other species, only a few representatives still survive in the wild. The U.S. Department of the Interior has put no fewer than 109 species on the endangered species list. This list includes everything from th
A. Europe
B. Australia
C. North America
D. South America
[填空题]How many versions appeared in the passage
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[简答题] Origin of Vegetable and Animal Life in America
When the new world was first discovered, it was found to be, like the old, full of plants and animals, and a great many tribes and nations of men lived there. Yet the plants and animals, if not the men, were all essentially different from those known in the old world. This was unexpected; it was thought to be quite remarkable. Then a question arose, what is the origin of these plants and animals and men How could they come to a continent that is cut off apparently from all intercourse (交流) and connection with the rest of the world For the American continent is entirely separated from the old. The nearest approach to it is at Behring’’sStraits (白令海峡), on the north-west, where it is divided from the Asiatic continent by a channel about forty miles wide.
Means of Communication with the Old World
Some animals and perhaps some plants, and most certainly men, may be supposed to have been transported across such
