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时间:2019-02-28
《科技话题原创阅读理解高三备考》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
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
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