以下是引用calista5133在2004-10-23 6:09:00的发言:Q14:
The Eurasian ruffe, a fish species inadvertently introduced into North America’s Great Lakes in recent years, feeds on the eggs of lake whitefish, a native species, thus threatening the lakes’ natural ecosystem. To help track the ruffe’s spread, government agencies have produced wallet-sized cards about the ruffe. The cards contain pictures of the ruffe and explain the danger they pose; the cards also request anglers to report any ruffe they catch.
Which of the following, if true, would provide most support for the prediction that the
agencies’ action will have its intended effect?
A. The ruffe has spiny fins that make it unattractive as prey.
B. Ruffe generally feed at night, but most recreational fishing on the Great Lakes is done during daytime hours.
C. Most people who fish recreationally on the Great Lakes are interested in the preservation of the lake whitefish because it is a highly prized game fish.
D. The ruffe is one of several nonnative species in the Great Lakes whose existence threatens the survival of lake whitefish populations there.
E. The bait that most people use when fishing for whitefish on the Great Lakes is not attractive to ruffe. 答案给的是C,请NN们帮助分析一下!i wonder why a is not right?i can not see any relation between the question and the choice of c is ,so can anyone help me?thanks a lot!
说说个人看法
题目核心:做卡片和要求报告这些措施可以有助于追踪R的传播。
支持E。钓W的鱼饵不会吸引R——R虽出没在那个地方,但不会因被钓上来而减少,使得渔民有报告的机会。
如果把E取非:钓W的鱼饵会吸引R——R会被钓上来,那么即使渔民报告了R的存在,也不会起到tranck R's spread的作用(因为R被钓上来了,水里不存在了)
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