A major mason for conflict in the animal world is territory. The male animal【C1】______an area. The size of the area is sufficien

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问题     A major mason for conflict in the animal world is territory. The male animal【C1】______an area. The size of the area is sufficient to provide food for him, his【C2】______and their offspring. Migrating birds, for example,【C3】______up the best territory in the order of "first come, first【C4】______". The late arrivals may acquire【C5】______ territories, but【C6】______food is available, or they are too close to the【C7】______of the enemies of the species.
    When there is conflict over territory, animals will commonly use force, or a【C8】______of force, to decide which will stay and which will go. It is interesting to note,【C9】______, that animals seem to use only the【C10】______ amount of force necessary to drive away the intruder. There is usually no killing. In the【C11】______of those animals which are capable【C12】______doing each other harm, there is a【C13】______for the losing animal to show the winning animal that he wishes to submit.
    When he shows this, the【C14】______normally stops fighting. Animals( especially birds),【C15】______can easily escape from conflict seem to have no【C16】______against killing, and equally no mechanism for【C17】______. The losing bird simply flies away. However, two pigeons are placed in a cage, and they start if fighting, they will continue to fight【C18】______one kills the other. We all think of the pigeon as a【C19】______of peace and, in its natural habitat, it is peaceful. But the "peace" mechanism does not【C20】______in a cage.
【C16】

选项 A、prevention
B、obstacle
C、stop
D、way

答案B

解析 此题为词语辨析类题目。最后几道题需综合起来考虑,把最后几句话读懂后,考生不难发现,最后这段话和前面一段是对比的关系。前面说的是动物使用最少的武力,这段话说的是对于那些擅长从冲突中逃跑的动物,特别是对鸟来说,它们一打架,在空旷的地区,就要一方跑掉,在不自由的空间,就一定要斗个你死我活。只要理解到这点,后几道题就不难答对。本道题原文的意思是:对于那些擅长从冲突中逃跑的动物,特别是鸟类来说,并没有杀害对方的限制。A) prevention 的意思是“预防;阻止;妨碍”,但这个词通常和of 一起连用,而很少和 against连用,而且前面加动词have 的情况也没有;B) obstacle 的意思是“障碍(物),妨碍,阻碍,干扰”,have an obstacle against sth.是固定词组,意思是“对……起阻碍作用”;C) stop 和D) way 都与原文有一定差距。
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