科技话题原创阅读理解高三备考

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1、阅读与完形高三Passage1题材体裁难度系数字数题数阅读时间正确率科学技术说明文★★35656分钟http://www.articlesbase.com/gardening-articles/led-grow-light-techniques-6399166.htmlAnelectriclightsourcethatisdesignedtostimulatethegrowthofplantsbywayofanelectromagneticspectrum(电磁谱)isgenerallycalledanLEDg

2、rowlight.Itwillemitanelectromagneticspectrumthatisgoodenoughfortheprocessofphotosynthesis(光合作用).Theyaremostcommonlyusedinwinter.Thisisbecausewinteristhecoldesttimeofyearwithalargenumberofcloudscoveringupthenaturalsunlight.Itisvitalforplantstoreceiveenoughsun

3、lighttogrow.AnLEDgrowlightisaveryefficienttoolforgardenersduringthewinterseasonbecauseitallowsthemtocontinuegrowingplantsthataregenerallymadeforthesummerandspring.Thegrowlightsimitatethesamelightgivenfromthenaturalsunlight.Theycanalsobeadjustedtoemitonlyenou

4、ghlighttostimulatethegrowthofaparticulartypeofplant.TheLEDgrowlightsareabletomimicthedifferenttemperaturesoftheweather.Thisisdoneusingvariouscolorsthataremadebythegrowlights.Itisalsomadepossiblebythedifferentlevelsofintensity(强度)thatcanbeadjustedontheLEDgrow

5、lights.Thelightscanbeadjustedbasedofthestageofcultivationoftheplants.Thiscanbeconcerningthegrowthstage,floweringphase,orthefruitingphase.Homeandgardenstoreswillhavealltheequipmentneededforgrowingahealthygarden,andasmorepeoplestartusingLEDtechnology,theywillc

6、arryevenmoreoptions.LEDgrowlightsareincreasinglybeingusedoutsidetheindustrialsector,though.Peoplewholovetogrowtheirownplantsoutsideandinpersonalgreenhousesusethelightsasapermanentelementofgrowingtheirplants.Somepeopleonlyusethegrowlightswhentheyareneeded,suc

7、hasinthewinter.AsLEDlightsbecomemorepopular,peoplearefindingwaystousethemcreativelyandmaximizetheiroutput.Whetherthroughtheuseofmirrorsorgreenhouses,itisclearthatplantsbenefitfromtheiruse.ItlookslikeLEDgrowlightsareheretostay.根据短文内容，选择最佳答案。1.Thegrowlightswas

8、invented______.A.toprotectplantsB.togivelightingatnightC.toincreaseproductionD.towarmupinwinter2.Weneedn’tuseLEDgrowlights______.A.insummerB.ingreenhousesC.inwinterD.intheindustrialsector3.Theun