标题: 求助prep2 1！ [打印本页] 作者: louis_huang 时间: 2010-9-15 05:40 标题: 求助prep2 1！ On Pacific islands, a newly arrived gecko species, the house gecko, is displacing the previously established mourning gecko in urban areas, but populations of the two species are more stable in rural areas far from human settlement.The house gecko does not attack the mourning gecko, but in areas where insects congregate it prevents the mourning gecko from feeding on them.
Which of the following contributes most to an explanation of the difference between gecko populations in urban and rural areas?
(A) In urban areas, geckos are valued because they eat so many insects.
(B) Geckos defend territories against other members of the same species.
(C) House geckos that arrive on islands are carried there in boats and planes.
(D) In places where there are lighted buildings, insects tend to gather around the light.
(E) Mourning geckos are all females and reproduce asexually, but house geckos reproduce sexually. 该题答案是不是假定城里的灯比较多啊？ 该题如何理解？作者: 芷萱85 时间: 2010-9-15 09:11
rural areas还有个far from human settlement修饰。lz很可能是在推理的过程省略了没人定居的郊区的定语。题目是说有人的地方就有光，有光的地方昆虫多，昆虫多的地方，h不让m吃，饿死了小m作者: didai1314 时间: 2010-9-15 12:05
一看答案特明白,不看答案就选错作者: frankzhiwei 时间: 2010-9-15 14:13
就是选C？
