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题库 / Prep2012-CR-62
In 1992 outlaw fishing boats began illegally harvesting lobsters from the territorial waters of the country of Belukia. Soon after, the annual tonnage of lobster legally harvested in Belukian waters began declining; in 1996, despite there being no reduction in the level of legal lobster fishing activity, the local catch was 9,000 tons below pre-1992 levels. It is therefore highly likely that the outlaw fishing boats harvested about 9,000 tons of lobster illegally that year.
Which of the following is an assumption on which the argument depends?
The illegal lobster harvesting was not so extensive that the population of catchable lobsters in Belukia's territorial waters had sharply declined by 1996.
The average annual lobster catch, in tons, of an outlaw fishing boat has increased since 1992.
Outlaw fishing boats do not, as a group, harvest more lobsters than do licensed lobster-fishing boats.
The annual legal lobster harvest in Belukia in 1996 was not significantly less than 9,000 tons.
A significant proportion of Belukia's operators of licensed lobster-fishing boats went out of business between 1992 and 1996.
P：合法捕虾不变，但96年比92年少捕了9000吨虾
C：就是非法捕虾捕走了这9000吨
Assumption：总捕虾数量不变。如果总虾数都减少了的话，不就不能支持那9000是被非法捕走。
选项A：
The illegal lobster harvesting was 【not 否定】 so extensive that the 【population总数量】 of catchable lobsters in Belukia's territorial waters had sharply declined by 1996. 非法捕捞龙虾并没有那么密集，以至于到 1996 年，Belukia 领海中可捕捞的龙虾数量急剧下降。
A 说并没有因为大量非法捕捞而导致总↓数量减少，---这就奠定了一个数量不变的基础，正确。
思路1：取非：密集地非法捕捞龙虾→虾的总数减少→合法捕捞 + 非法捕捞的数量都减少了→非法捕捞的数量就不是9000，削弱了结论
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