PREP07逻辑 鲨鱼那题24371-!-item-!-188;#058&000859

toogy123

Tiger sharks are common in the waters surrounding Tenare Island. Usually tiger sharks feed on smaller sharks, but sometimes they have attacked tourists swimming and surfing at Tenare's beaches. This has hurt Tenare's tourism industry, which is second only to its fishing industry in annual revenues. In order to help the economy, therefore, the mayor of the island has proposed an ongoing program to kill any tiger sharks within a mile of the beaches.
Which of the following, if true, most strongly calls into question the likelihood that implementation of the mayor's proposal will have the desired consequence?
(A) Even if not all the tiger sharks that come close to the beaches are killed, the existence of the program would reassure tourists.
(B) Business owners who depend on tourism are willing to pay most of the cost of implementing the program.
(C) Tourists come to Tenare Island for its beaches, even though the island features a number of other tourist attractions.
(D) The small sharks on which tiger sharks prey feed on fish that are commercially important to the island's fisheries.
(E) Not all tourists who come to Tenare Island enjoy swimming or surfing.


答案是D  ABCE 很好排除 我的疑问是
D  tiger shark feed  on small  shark,   D说small  shark有经济价值， 那杀了tiger shark 不对有利于small shark么， so 有利于经济，
我感觉D是support.

求大牛解惑

多谢啦 dears

shl020

lz是错误理解D选项了 这句话的结构应该是：【The small sharks】(on which tiger sharks prey) feed on fish(that are commercially important to the island's fisheries). 所以tiger shark吃small sharks, small sharks吃fish，杀了TS, SS就会增加，就会吃更多的鱼，而这种鱼是commercially important to the island's fisheries，所以削弱了。

toogy123

对哈， 明白了， 看来是我句子成分不过关啊，  
多谢啦
哈哈哈哈

ninamikou

up up up!!!!我也一直没理解><

InfiniteAlex

well, thanks a lot