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A major reason for 【21】______ in the animal world is territory. The male animal establishes an area. The size of the area is
A major reason for 【21】______ in the animal world is territory. The male animal establishes an area. The size of the area is
admin
2010-07-06
58
问题
A major reason for 【21】______ in the animal world is territory. The male animal establishes an area. The size of the area is sufficient to provide food for him, his 【22】______ and their offspring. Migrating birds, for example, 【23】______ up the best territory in the order of" first come, first 【24】______ . "The late arrivals may acquire larger territories, but less food is 【25】______ ,or they are too close to the 【26】______ of the enemies of the species. 【27】______ there is really insufficient food or the danger is very great, the animal will not mate. In this way, the members of the species which are less fit will not have 【28】______ .
When there is conflict 【29】______ territory, animals will commonly use force, or 【30】______ of force, to decide which will stay and which will go. It is interesting to note, however, that animals seem to use the 【31】______ amount of force necessary to drive away the 【32】______ . There is usually no killing. In tile case of those animals which are 【33】______ of doing each other great harm, there is a system for the 【34】______ animal to show the winning animal that he wishes to 【35】______ . When he shows this, the 【36】______ normally stops fighting. Animals especially birds, which can easily escape from conflict seem to have no obstacle against killing, equally no mechanism 【37】______ submission. The defeated bird simply flies away. However, if two doves are 【38】______ in a cage, and they start fighting, they will continue to fight until one kills the other. We all think of the dove as a 【39】______ of peace and, in its natural habitat,it is peaceful. But the" peace "mechanism does not 【40】______ in a cage.
【31】
选项
A、minimum
B、maximum
C、scarce
D、sufficient
答案
A
解析
A minimum“最小的、最少的”;B maximum“最大的、最多”;C scarce“缺乏的、不足的、稀有的”;D sufficient“充分的、足够的”。本句意为“尽管这样,有趣的是动物似乎只用所需要的最少的武力来驱逐入侵者。”
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