Americanblackbearsappearinavarietyofcolorsdespitethei...
问题详情:
American black bears appear in a variety of colors despite their name. In the eastern part of their range, most of these bears have shiny black fur, but in the west they grow brown, red, or even yellow coats. 36 Even in the same litter (一窝幼崽), both brown and black furred bears may be born.
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. 37 . 38 .However, if attacked, most can climb trees and cover ground at great speeds. When angry or frightened, they are formidable(可怕的) enemies.
Black bears feed on leaves, herbs, fruit, berries, insects, fish, and even larger animals. 39 .
Unlike squirrels, woodchucks, and many other woodland animals, bears do not actually hibernate
(冬眠) .. Although the bear does not eat during the winter months, sustaining itself from body fat, its temperature remains almost normal, and it breathes regularly four or five times per minute.
40 They prefer to live in caves. Baby black bears are born in January or February after a gestation(怀孕) period of six to nine months, and they stay with their mother until they are fully grown or about one and a half years old. Black bears can live as long as thirty years in the wild, and even longer in some nature reserves.
A. To the north, the black bear is actually gray or white in color.
B. Black bears mate(交配) all year round.
C. One of the most interesting characteristics of bears, including the black bear, is their winter sleep.
D. Like all bears, the black bear is timid, clumsy, and rarely dangerous.
E. Bears often eat a lot of food before they hibernate in their caves.
F. Most black bears live alone, except during mating season.
G. Their eyes and ears are small and their eyesight and hearing are not as good as their sense of smell.
【回答】
AGDCF
知识点:七选五题型
题型:未分类
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下列加点词注音全对的一项是( )A.浣女(huàn) 谄媚(xiàn) 邂逅(xiè)B.惘然(wǎn...
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对于锌一铜一稀硫*组成的原电池装置中,当导线中有1mol电子通过时,理论上的两极变化是( )。 ①锌片...
问题详情:对于锌一铜一稀硫*组成的原电池装置中,当导线中有1mol电子通过时,理论上的两极变化是( )。 ①锌片溶解了32.5g②锌片增重32.5g③铜片上析出lgH2 ④铜片上析出1molH2 A.①和③ B.①和④ C.②和③ D.②和④【回答】A知识...
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已知铁的一种氧化物,其中含氧元素的质量分数为30%,则这种铁的氧化物的化学式为 ( ) A.FeO ...
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某有机物结构简式为,下列关于该有机物的说法中不正确的是( )A.遇FeCl3溶液显紫*B.与足量的*氧化*溶...
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