【单选题】
A、major reason for conflict in the animal world is territory. The male animal {{U}} (1) {{/U}} an areA、The size of the area is sufficient to provide food for him, his {{U}} (2) {{/U}} and their offspring. Migrating birds, for example, {{U}} (3) {{/U}} up the best territory in the order of "first come, first {{U}} (4) {{/U}}." The late arrivals may acquire {{U}} (5) {{/U}} territories, but less food is available, or they are too close to the {{U}} (6) {{/U}} of the enemies of the species. {{U}} (7) {{/U}} there is really insufficient food or the danger is very great, the animal will not {{U}} (8) {{/U}}. In this way, the members of the species which are less fit will not have offspring.
When there is conflict {{U}} (9) {{/U}} territory, animals will commonly use force, or a {{U}} (10) {{/U}} of force, to decide which will stay and which will go. It is interesting to note, however, that animals seem to use {{U}} (11) {{/U}} the minimum amount of force {{U}} (12) {{/U}} to drive away the intruder. There is usually no killing. In the {{U}} (13) {{/U}} of those animals which are capable of doing each other great harm, {{U}} (14) {{/U}} is a system for the losing animal to show the winning animals that he {{U}} (15) {{/U}} to submit. When he shows this, the {{U}} (16) {{/U}} normally stops fighting.Animals (especially birds), which can easily escape from conflict seem to have. {{U}} (17) {{/U}}obstacle against killing, and equally no mechanism {{U}} (18) {{/U}} submission. The losing bird simply flies away. However, if two doves are {{U}} (19) {{/U}} 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 symbol of peace and, in its natural habitat, it is peaceful.But the "peace" mechanism does not {{U}} (20) {{/U}} in a cage.
B、mate
C．friend
D．neighbor
网考网参考答案：B
网考网解析：
本题测试惯用搭配。mate意为“(鸟、兽的)配偶”。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>
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