逻辑每日一题王文静GMAT专栏

2024-07-31 15:58:08来源:西游留学网作者:浮夸 阅读量:19512

In the late 1980s,thepopulationofseaottersinthenorthpacificbegantodecline.therearetwoplausibleeexplanationsforthedecline:preprepretine possibly by killer whales,or disease. Of these two,disease is the more likely, sinceaconcurrentsharpdeclineinpopulationsofsealsandsealionsisbelievedtohavebeencausedbydisease,anddiseasesthatinfecthesecrecred

Which of the following,if true,mostseriouslyweakensthereasoning

逻辑每日一题王文静GMAT专栏

( a ) killerwhalesinthenorthpacificusuallypreyonsealsandsealionsbutwill,when this food source is scarce,seek out other prey。

) b ) thereisnoindicationthattheseaotterpopulationatanynorthpacificlocationdeclinedinthe 1980 sbecauseofsubstantialnumbersofseaofseation

( c ) alongthepacificcoastofnorthamericainthe 1980 s,seaotterswereabsentfrommanylocationswheretheyhadbeenrelativelycommoninfore

( d ) followingthedeclineinthepopulationoftheseaotters、therewasanincreaseinthepopulationofseaurchins、whichareseaotters'mme

( e ) thenorthpacificpopulationsofsealsandsealionscoverawidergeographicareathandoesthepopulationofseaotters。

逻辑: seal和sea lion的传染病也下降了疾病是sea otter下降的原因

寻求削弱

a .杀人鲸鱼在seal和sea lion没吃的时候会吃别的东西

没有证据证明sea otter减少是因为移动了

c .很多其他地方的sea otter也不见了

D. Sea otter减少了怎么办?

E. Seal和sea lion覆盖地区与sea otter比

B排除了一个其他因素,但不能排除所有其他因素,必须杀死所有其他可能性,才能加重疾病的原因。

c我不介意其他地方。 我也不在乎d少了以后的结果。 即使e覆盖地区我也不介意。

但是,a说杀人的鲸鱼吃sea otter。 如果其sea otter下降,则有可能被捕食而不是生病,原文的逻辑链会被削弱。

A

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