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  3. By far the most common snake in Britain is the adder (蝰蛇,小毒蛇). In Scotland, in fact, there are no other snakes at all. The adder

By far the most common snake in Britain is the adder (蝰蛇,小毒蛇). In Scotland, in fact, there are no other snakes at all. The adder

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问题     By far the most common snake in Britain is the adder (蝰蛇,小毒蛇). In Scotland, in fact, there are no other snakes at all. The adder is also the only British snake with a poisonous bite. It can be found almost anywhere, but prefers sunny hillsides and rough open country, including high ground. In Ireland there are no snakes at all.
    Most people regard snake bites as a fatal misfortune, but not all bites are serious, and very few are fatal. Sometimes attempts at emergency treatment turn out to be more dangerous than the bite itself, with amateurs heroically (英雄地)，but mistakenly trying to do-it-yourself surgery and other unnecessary measure.
    All snakes have small teeth, so it follows that all snakes can bite, but only the bite of the adder presents any danger. British snakes are shy animals and are far more frightened of you than you could possibly be of them. The adder will attack only if it feels threatened, as can happen if you take it by surprise and step on it accidentally, or if you try to catch it or pick it up, which it dislikes intensely. If it hears you coming, it will normally get out of the way as quickly as it can, but adders cannot move very rapidly and may attack before moving if you are very close.
    The effect of a bite varies considerably. It depends upon several things, one of which is the body weight of the person bitten. The bigger the person, the less harmful the bite is likely to be, which is why children suffer far more seriously from snake bites in Britain and though the bites can make some people very ill, there are probably just as many cases of bites having little or no effect, as there are of serious illness.
We are told that adders were______.
选项 A、not afraid of human beings
B、aggressive towards anyone in their territory
C、unlikely to bite except in self-defense
D、normally friendly towards people
答案C
解析 本题是一道具体细节题。问我们知道蝰蛇有什么特点。文章第三段告诉我们，英国的蛇胆子小，人虽怕蛇，但蛇更怕人。蝰蛇只有在受到惊吓时才发动攻击，也就是当人们偶然给它以惊吓、偶然踩在它身上、企图把它抓住或把它捡起来时，它们很不喜欢这样。只有这些时候它才咬人。如果蛇听到人们走近，一般会尽快离开，但是蝰蛇移动缓慢，如果人们离它很近时，它会首先发起攻击，然后离开。因此，本题的正确答案应是C“蝰蛇除非在自卫的情况下一般是不会咬人的”。
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