GRE阅读练习每日一篇(八)
<p> 编辑点评： <span word="GRE">GRE</span>阅读的方法相信大家已经积累了很多了，本文就为大家提供一些<span word="GRE">GRE</span>阅读的材料，大家来练一练，把平时学到的东西运用到实际中，也多多积累词汇和句子，提高自己的阅读能力。</p><p> 每天做一些标准的<span word="GRE">GRE</span>阅读练习，有助于大家在<span word="GRE">GRE</span>考试的复习过程中不断地进行练习和总结。希望大家在进行<span word="GRE">GRE</span>阅读练习时，充分运用平时所积累的知识，这样才能有效果。</p><p> <span word="The">The</span> <span word="Food">Food</span> <span word="and">and</span> <span word="Drug">Drug</span> <span word="Administration">Administration</span> <span word="has">has</span> <span word="recently">recently</span> <span word="proposed">proposed</span> <span word="severe">severe</span> <span word="restrictions">restrictions</span> <span word="on">on</span> <span word="the">the</span> <span word="use">use</span> <span word="of">of</span> <span word="antibiotics">antibiotics</span> <span word="to">to</span> <span word="promote">promote</span> <span word="the">the</span> <span word="health">health</span> <span word="and">and</span> <span word="growth">growth</span> <span word="of">of</span> <span word="meat">meat</span> <span word="animals">animals</span>. <span word="Medications">Medications</span> <span word="added">added</span> <span word="to">to</span> <span word="feeds">feeds</span> <span word="kill">kill</span> <span word="many">many</span> <span word="microorganisms">microorganisms</span> <span word="but">but</span> <span word="also">also</span> <span word="encourage">encourage</span> <span word="the">the</span> <span word="appearance">appearance</span> <span word="of">of</span> <span word="bacterial">bacterial</span> <span word="strains">strains</span> <span word="that">that</span> <span word="are">are</span> <span word="resistant">resistant</span> <span word="to">to</span> <span word="anti">anti</span>-<span word="infective">infective</span> <span word="drugs">drugs</span>. <span word="Already">Already</span>, <span word="for">for</span> <span word="example">example</span>, <span word="penicillin">penicillin</span> <span word="and">and</span> <span word="the">the</span> <span word="tetracyclines">tetracyclines</span> <span word="are">are</span> <span word="not">not</span> <span word="as">as</span> <span word="effective">effective</span> <span word="therapeutically">therapeutically</span> <span word="as">as</span> <span word="they">they</span> <span word="once">once</span> <span word="were">were</span>. <span word="The">The</span> <span word="drug">drug</span> <span word="resistance">resistance</span> <span word="is">is</span> <span word="chiefly">chiefly</span> <span word="conferred">conferred</span> <span word="by">by</span> <span word="tiny">tiny</span> <span word="circlets">circlets</span> <span word="of">of</span> <span word="genes">genes</span>, <span word="called">called</span> <span word="plasmids">plasmids</span>, <span word="that">that</span> <span word="can">can</span> <span word="be">be</span> <span word="exchanged">exchanged</span> <span word="between">between</span> <span word="different">different</span> <span word="strains">strains</span> <span word="and">and</span> <span word="even">even</span> <span word="different">different</span> <span word="species">species</span> <span word="of">of</span> <span word="bacteria">bacteria</span>. <span word="Plasmids">Plasmids</span> <span word="are">are</span> <span word="also">also</span> <span word="one">one</span> <span word="of">of</span> <span word="the">the</span> <span word="two">two</span> <span word="kinds">kinds</span> <span word="of">of</span> <span word="vehicles">vehicles</span> <span word="that">that</span> <span word="molecular">molecular</span> <span word="biologists">biologists</span> <span word="depend">depend</span> <span word="on">on</span> <span word="when">when</span> <span word="performing">performing</span> <span word="gene">gene</span> <span word="transplant">transplant</span> <span word="experiments">experiments</span>. <span word="Even">Even</span> <span word="present">present</span> <span word="guidelines">guidelines</span> <span word="forbid">forbid</span> <span word="the">the</span> <span word="laboratory">laboratory</span> <span word="use">use</span> <span word="of">of</span> <span word="plasmids">plasmids</span> <span word="bearing">bearing</span> <span word="genes">genes</span> <span word="for">for</span> <span word="resistance">resistance</span> <span word="to">to</span> <span word="antibiotics">antibiotics</span>. <span word="Yet">Yet</span>, <span word="while">while</span> <span word="congressional">congressional</span> <span word="debate">debate</span> <span word="rages">rages</span> <span word="over">over</span> <span word="whether">whether</span> <span word="or">or</span> <span word="not">not</span> <span word="to">to</span> <span word="toughen">toughen</span> <span word="these">these</span> <span word="restrictions">restrictions</span> <span word="on">on</span> <span word="scientists">scientists</span> <span word="in">in</span> <span word="their">their</span> <span word="laboratories">laboratories</span>, <span word="little">little</span> <span word="congressional">congressional</span> <span word="attention">attention</span> <span word="has">has</span> <span word="been">been</span> <span word="focused">focused</span> <span word="on">on</span> <span word="an">an</span> <span word="ill">ill</span>-<span word="advised">advised</span> <span word="agricultural">agricultural</span> <span word="practice">practice</span> <span word="that">that</span> <span word="produces">produces</span> <span word="known">known</span> <span word="deleterious">deleterious</span> <span word="effects">effects</span>.</p>
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