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The average temperature of the lobster-rich waters off the coast of Foerklan
The average temperature of the lobster-rich waters off the coast of Foerklan
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2025-02-19
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问题
The average temperature of the lobster-rich waters off the coast of Foerkland has been increasing for some years. In warmer water, lobsters grow faster. In particular, lobster larvae take less time to reach the size at which they are no longer vulnerable to predation by young cod, the chief threat to their survival. Consequently, the survival rate of lobster larvae must be going up, and the lobster population in Foerkland’s coastal waters is bound to increase.
Which of the following, if true, most seriously weakens the argument?
选项
A、There are indications that in recent years the fishing fleet operating off the coast of Foerkland has been taking cod at an unsustainably high rate.
B、The increase in water temperatures off Foerkland has not been as pronounced as the increase in average soil temperatures in Foerkland.
C、Because of their speeded-up growth, lobsters now get large enough to be legal catch before they reach reproductive maturity.
D、Even though lobsters grow faster in warmer waters, warmer waters have no effect on the maximum size to which a lobster can eventually grow.
E、Cod are a cold-water species, and the increasing water temperatures have caused a northward shift in Foerkland’s cod population.
答案
C
解析
龙虾因为长得快,导致可以在更早的年龄被捕捞,因此龙虾的数量会比之前更少,属于“直接削弱结论”,正确。A项鳕鱼没有被以非常高的速度被捕捞,这说明渔船并没有显著影响鳕鱼的数量,进而没有影响到龙虾的数量,与原文无关,故不选。B项水温上升和土壤温度上井谁更明显,与本文所讨论的内容无关,故不选。D项龙虾能够长成的最大体型与本文无关,故不选。E项鳕鱼迁徙离开福克兰,证明龙虾所面临的威胁减少,所以龙虾的数量有可能上升,加强原文,故不选。
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