2. 外语
  3. You should not fear spiders because of their poison. Of all the spiders in North America, only one kind is very【B1】______and mos

You should not fear spiders because of their poison. Of all the spiders in North America, only one kind is very【B1】______and mos

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问题     You should not fear spiders because of their poison. Of all the spiders in North America, only one kind is very【B1】______and most would not bite even if they were【B2】______. They much prefer to run away or to drop to the ground on a【B3】______of silk. Even so, when a spider runs directly toward a person, it gives the【B4】______that it is about to attack. Actually, it cannot see the person in its way. The spider is too【B5】______to see things at a distance. It only wants to go where it wouldn’t be【B6】______.
    In the United States only one kind of spider is responsible for the frightening【B7】______of the rest. It is the Black Widow(黑寡妇). So called because the female, which is larger than the male, often eats her【B8】______after making love.
【B9】______.She constructs a loose, irregular web under a pile of rowans(美洲花楸)or near the foundations of buildings where she is seldom disturbed.
    She is not an attacking spider and many people have proven this by letting her crawl over their hands.【B10】______. In spite of the stories you may have heard, it is rare for a person to be bitten by a Black Widow and even more unusual for the bite to prove fatal.【B11】______
【B3】
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