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The adderis the only poisonous snake nativeto Britain. Adders have the most highly developed poison injecting mechanism of all snakes, but they are not aggressive animals. Adders will only use their poison as a last means of defence, usually if caught or trodden on. No one has died from adder bites in Britain for over 20 years. By far the most common smake in Britain is the adder. In Scotland, in fact, there are no other snakes at all. The adder is also the only British sanke with a poisonous bite. It can be found almost anywhere, but prefers sunny hillsides and rough open country, including high gournd. 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, but mistakenly, trying do-it-yourself surgery and other unnecessary measures.
All snakes have small teeth, so it follows tha tall snakes can bite, but only te 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 severa things, one of which is the boidy-wight 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 thought these bites can make some pepe very ill, there are probably just as many cases of bites having little or no effect, as there are of serious illness.
小题1:What does the underlined phrase “ trodden on” probably mean?
A.Found outB.Heard fromC.Stepped on.D.Robbed of.
小题2:Where are adders to be found?
A.In fertile fields in Scotland.
B.On wild land throughout Britain.
C.In many parts of Britain and Ireland.
D.Everywhere in Britian except Scotland
小题3:What should you do if you are with someone who is bitten by an adder?
A.Catch the biting adder at onece.
B.Don’t worry about the bitten person.
C.Don’t try to treat the bite by yourself.
D.Operate on the person as soon as possible.
小题4:What’s the best title of the passage?
A.Poisonous SnakesB.Adders in Britain
C.Take Care oif Sake BitesD.Protec Endangered Adders

小题1:C
小题2:B
小题3:C
小题4:B

试题分析:文章介绍英国本地的毒蛇--蝰蛇,它们的身体构造和生活习性,值得注意的是蝰蛇是不会主动攻击人类的,而且如果被咬伤,也不要自己随便的处理。
小题1:猜词题:从文章第一段的句子:Adders will only use their poison as a last means of defence, usually if caught or trodden on. 蝰蛇只有被抓住或被踩到的时候,才会使用毒液防御,可知“ trodden on” 是“踩在上面”的意思,选C
小题2:细节题:从文章第一段的句子:It can be found almost anywhere, but prefers sunny hillsides and rough open country, including high gournd.可知蝰蛇可以在英国的野外被发现,选 B
小题3:细节题:从文章第二段的句子:Sometimes attempts at emergency treatment turn out to be more dangerous than the bite itself, with amateurs heroically, but mistakenly, trying do-it-yourself surgery and other unnecessary measures.可知如果我们和一个被蝰蛇咬到的人在一起的时候,应该不要自行处理咬伤,选C
小题4:标题确定题:从文章第一段的句子:The adder is the only poisonous snake native to Britain.可知这篇文章介绍了英国的蝰蛇,选B
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