|
TTGWD11-Q40: 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? A. The decline in the alligator population has meant that fishers can work in some parts of lakes and rivers that were formerly too dangerous. B. Over the last few years, Parland’s commercial fishing enterprises have increased the number of fishing boats they use. C. Many Parlanders who hunt alligators do so because of the high market price of alligator skins, not because of the threat alligators pose to the fish population. D. During Parland’s dry season, holes dug by alligators remain filled with water long enough to provide a safe place for the eggs of this fish species to hatch.鳄鱼和鱼之间的关系。 E. In several neighboring countries through which Parland’s rivers also flow, alligators are at risk of extinction as a result of extensive hunting. 这题我在B和D中徘徊了一下，后来还是选了B 我对于D的想法是：鳄鱼挖的洞有足够的水能使小鱼卵孵化，那孵化出来就是吃吗？我对于的理解是孵化出来不是更加鱼多了吗？
对于b个渔船多能不能做为一个他因所致的weaken呢？
[此贴子已经被作者于2008-6-8 5:09:36编辑过] | 
京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号
发表于 2008-6-8 05:09:00
