题库搜索>逻辑CR-11598
Parland’s alligator population has been declining in recent years, primarily because of hunting. Alligators prey heavily on a species of freshwater fish that is highly valued as food by Parlanders, who had hoped that the decline in the alligator population would lead to an increase in the numbers of these fish available for human consumption. Yet the population of this fish species has also declined, even though the annual number caught for human consumption has not increased.
Which of the following, if true, most helps to explain the decline in the population of the fish species?
分析A选项
分析B选项
分析C选项
分析D选项
分析E选项
我有更好的解析 
暂无雷哥网文字解析
A 由于短吻鳄减少，鱼可以生活在许多地方，有关，但没有解释，是驳斥了
B 公司增加了他们使用的捕鱼船，捕鱼船与客观，无关
C P是因为短吻鳄的市场价值高才捕猎他的，原文没有题，范围不对
D 如果短吻鳄存在会使鱼增加，有关
E 短吻鳄快灭绝了，无关
Barret
D 选项，鳄鱼提供安全场所给鱼类。因此鳄鱼数量减少会带来安全场所的减少，导致鱼的数量也下降。
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2017-12-09 10:50:52
suzy
前提：鳄鱼吃鱼 surprise：鳄鱼下降，鱼下降 F熬出头：鱼下降与human consumption无关 ABCE都与或多或少与hunman consumption有关，只有D讲鳄鱼和与的关系，correct
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2017-11-05 10:18:36
suzy回复suzy
FACT
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2017-11-05 10:19:01
weeklyup
A选项：鳄鱼数量下降意味着人们可以在以前觉得太危险的地方捕鱼了。由于前提中已经谈到过人类没有更多的捕鱼，所以就算是人类可以在更多的地方捕鱼，也不会影响淡水鱼的数量。 B选项：渔业公司增加了捕鱼船的数量。本选项和(A)的方向几乎相同，同样是不正确的。 C选项：许多Parland的人捕杀短吻鳄是因为鳄鱼皮，而不是因为要保护淡水鱼。本选项讲的是人类以什么原因捕杀鳄鱼，和推理文段的结论无关。 D选项：Correct. 在Parland干燥的季节，由鳄鱼打下的洞穴会储存足够长时间的水来给鱼类提供安全的场所孵化。本选项给出了鳄鱼对鱼群的贡献，可以反驳鳄鱼减少会让鱼类数量上升这一结论。 E选项：在一些Parland的河流流经的地方，短吻鳄由于过度的捕杀而正在面临灭绝的危险。本选项讲的是短吻鳄的情况，和淡水鱼的数量无关。
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2017-08-01 10:43:14
HoldGmat
A选项：鳄鱼数量下降意味着人们可以在以前觉得太危险的地方捕鱼了。由于前提中已经谈到过人类没有更多的捕鱼，所以就算是人类可以在更多的地方捕鱼，也不会影响淡水鱼的数量。 D选项：Correct. 在Parland干燥的季节，由鳄鱼打下的洞穴会储存足够长时间的水来给鱼类提供安全的场所孵化。本选项给出了鳄鱼对鱼群的贡献，可以反驳鳄鱼减少会让鱼类数量上升这一结论。
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2017-07-28 11:10:44
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