GRE阅读：逻辑题解析
<p> 1,<span word="Parlands">Parlands</span> <span word="alligator">alligator</span> <span word="population">population</span> <span word="has">has</span> <span word="been">been</span> <span word="declining">declining</span> <span word="in">in</span> <span word="recent">recent</span> <span word="years">years</span>，<span word="primarily">primarily</span> <span word="because">because</span> <span word="of">of</span> <span word="hunting">hunting</span>. <span word="Alligators">Alligators</span> <span word="prey">prey</span> <span word="heavily">heavily</span> <span word="on">on</span> <span word="a">a</span> <span word="species">species</span> <span word="of">of</span> <span word="freshwater">freshwater</span> <span word="fish">fish</span> <span word="that">that</span> <span word="is">is</span> <span word="highly">highly</span> <span word="valued">valued</span> <span word="as">as</span> <span word="food">food</span> <span word="by">by</span> <span word="Parilanders">Parilanders</span>，<span word="who">who</span> <span word="had">had</span> <span word="hoped">hoped</span> <span word="that">that</span> <span word="the">the</span> <span word="decline">decline</span> <span word="in">in</span> <span word="the">the</span> <span word="alligator">alligator</span> <span word="population">population</span> <span word="would">would</span> <span word="lead">lead</span> <span word="to">to</span> <span word="an">an</span> <span word="increase">increase</span> <span word="in">in</span> <span word="the">the</span> <span word="numbers">numbers</span> <span word="of">of</span> <span word="these">these</span> <span word="fish">fish</span> <span word="available">available</span> <span word="for">for</span> <span word="human">human</span> <span word="consumption">consumption</span>. <span word="Yet">Yet</span> <span word="the">the</span> <span word="population">population</span> <span word="of">of</span> <span word="this">this</span> <span word="fish">fish</span> <span word="has">has</span> <span word="also">also</span> <span word="declined">declined</span>，<span word="even">even</span> <span word="though">though</span> <span word="the">the</span> <span word="annual">annual</span> <span word="number">number</span> <span word="caught">caught</span> <span word="for">for</span> <span word="human">human</span> <span word="consumption">consumption</span> <span word="has">has</span> <span word="not">not</span> <span word="increased">increased</span>.</p><p> <span word="P">P</span>地区的短吻鳄数量近些年下降，主要原因是捕猎。短吻鳄捕食的淡水鱼是<span word="P">P</span>居民的食物，<span word="P">P</span>居民希望短吻鳄数量的下降可以导致这种可供人们消费的鱼的数量上升。但是这种鱼的数量也下降了，尽管它每年被人类抓住消费的的量没有增加。</p><p> <span word="Which">Which</span> <span word="of">of</span> <span word="following">following</span>，<span word="if">if</span> <span word="true">true</span>，<span word="most">most</span> <span word="help">help</span> <span word="to">to</span> <span word="explain">explain</span> <span word="the">the</span> <span word="decline">decline</span> <span word="in">in</span> <span word="the">the</span> <span word="population">population</span> <span word="of">of</span> <span word="the">the</span> <span word="fish">fish</span> <span word="species">species</span>?</p><p> 下列哪个选项如果是对的，最有效地解释了鱼的数量下降?</p><p> <span word="A">A</span>.<span word="The">The</span> <span word="decline">decline</span> <span word="in">in</span> <span word="the">the</span> <span word="alligator">alligator</span> <span word="population">population</span> <span word="has">has</span> <span word="meant">meant</span> <span word="that">that</span> <span word="fishers">fishers</span> <span word="can">can</span> <span word="work">work</span> <span word="in">in</span> <span word="some">some</span> <span word="parts">parts</span> <span word="of">of</span> <span word="lakes">lakes</span> <span word="and">and</span> <span word="rivers">rivers</span> <span word="that">that</span> <span word="were">were</span> <span word="formerly">formerly</span> <span word="too">too</span> <span word="dangerous">dangerous</span>.</p><p> 短吻鳄数量的下降意味着渔民可以到以前湖里和江河里那些以前很危险的地方工作。</p><p> <span word="B">B</span>.<span word="Over">Over</span> <span word="the">the</span> <span word="last">last</span> <span word="few">few</span> <span word="years">years</span>，<span word="Parlands">Parlands</span> <span word="commercial">commercial</span> <span word="fishing">fishing</span> <span word="enterprises">enterprises</span> <span word="have">have</span> <span word="increased">increased</span> <span word="the">the</span> <span word="number">number</span> <span word="of">of</span> <span word="fishing">fishing</span> <span word="boats">boats</span> <span word="they">they</span> <span word="use">use</span>.</p>
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