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In the north part of black bear’s range, most of them are______.
In the north part of black bear’s range, most of them are______.
admin
2014-09-18
54
问题
In the north part of black bear’s range, most of them are______.
American black bears appear in a variety of colors despite their name. In the eastern part of their range, most of them are brown, red, or even yellow. (17)To the north, the black bear is actually gray or white in color. Even in the same family, both brown and black color bears may be born. (18) Black bears are the smallest of all American bears, ranging in length from five to six feet, weighing from three hundred to five hundred pounds. Their eyes and ears are small and their eyesight and hearing are not as good as their sense of smell. Like all bears, the black bear is timid, clumsy, and rarely dangerous, (19)but if attacked, most can climb trees and run at great speeds. When angry or frightened, it is a dangerous enemy. Black bears feed on leaves, plants, fruits, berries, insects, fish, and even larger animals. One of the most interesting characteristics of bears, including the black bear, is their winter sleep. (20) Unlike other woodland animals, bears do not actually sleep in winter. Although the bear does not live on body fat during the winter months, its temperature remains almost normal, and it breathes regularly four or five times per minute.
选项
A、sleep like other woodland animals
B、keep their normal temperature
C、breathe regularly nine times per minute
D、live on body fat
答案
B
解析
细节题。黑熊冬眠情况:不同于林地生物,黑熊冬眠时并不是真的睡觉,也不靠体内脂肪生存。它在冬眠时保持正常体温,而且呼吸均匀,约每分钟4-5次,因此正确答案为B。
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专业英语四级
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