首页
试卷库
试题库
当前位置：
X题卡
>
所有题目
>
题目详情
水稻收获后，要充分晾晒才能入库，这样做的目的是（ ）
查看本题答案
包含此试题的试卷
高三下学期生物《》真题及答案
点击查看
你可能感兴趣的试题
首先用割晒机将作物割倒晾晒3～5天然后用装有捡拾器的联合收获机分条拾起再行脱粒和清选这种收获方式叫
分别收获法
两段收获法
联合收获法
半机械收获法
对于写字楼项目要充分考虑项目所处地区的流动人口和常住人口的数量最后才能确定项目的规模档次
移栽某些幼树时常剪去部分叶片刚收获的小麦种子要凉晒后才能贮存以上措施的主要目的依次是①降低光合作用②
①③
①④
②③
②④
有时瓶盖拧得太紧为了把它打开往往要包上一块毛巾后再拧这样做的目的是为了增大______从而达到增大_
在农业保险中承保作物收获后在进行晾晒轧打脱粒和烘烤过程中因遭受水灾洪水暴风雨等灾害造成农作物产品损失
收获期农作物保险
收获期保险
收获期果木保险
收获期养殖保险
移栽某植物时常剪去部分叶片刚收获的小麦种子需晾干后才能入库种子萌发前要给予适宜的水分这些措施的主要目
①③⑥
②④⑥
⑤①②
③④①
有时瓶盖拧得太紧为了把它打开往往要包上一块毛巾后再拧这样做的目的是为了增大______从而达到增大_
2009年大连模拟移栽某植物时常剪去部分叶片刚收获的小麦种子需晾干后才能入库种子萌发前要给予适宜的水
①③⑥
②④⑥
⑤①②
③④①
使用文件系统时通常要显式地进行OpenClose操作这样做的目的是什么
下列人类的活动中能促进植物呼吸作用的是
将水稻和小麦的种子晒干后入库保存
玉米播种前要耕田松土
夜间，给种植蔬菜的温室大棚降温
将水果、蔬菜放在低温条件下贮藏
有时瓶盖拧得太紧为了把它打开往往要包上一块毛巾后再拧这样做的目的是为了增大______从而达到增大_
小明在表演二胡节目时往往要调整琴弦的松紧程度他这样做的目的是要改变琴声的填响度或音调.
荆江两岸的农民将丰收的水稻和小麦收获后入库存入前都会尽快晒干其目的是
降低蒸腾作用，避免能量消耗
促进光合作用，延长种子寿命
保证种皮干燥，防止虫类咬蛀
抑制呼吸作用，降低有机物的消耗
水田在水稻收获后开沟排水种植秋大豆利用大豆生物固氮培肥土壤是一项工程措施
政策不仅要告诉人们什么是该做的什么是不该做的而且还要使人们明白为什么要 这样做而不那样做怎样才能做得
强制功能
引导功能
服务功能
控制功能
汽轮机启动前要先启动润滑油泵运行一段时间后再启动__调速油泵这样做的主要目的是
水稻只有在及时收获才能保证稻米品质和产量
绿熟期
蜡熟期
完熟期
过熟期
水稻生产季节性强周期性长一般要经过等作业过程
整地
播种
田间管理
收获
晾衣服时要把衣服抖散开套在衣架上晾晒这样做衣服干得快其原因是
在水中做浮体时首先要吸足气并保持屏息其次是要放松这样才能很好的浮起来
热门试题
更多
已知R为实数集集合A＝{x|x2﹣4x﹣5＞0}则∁RA＝
TheWorldHealthOrganizationrecentlysaidthatitplannedtoaddgamingdisorder游戏成瘾toitsnewlistofdiseaseclassificationsangeringthegamingindustrybutpleasingdoctorswhohopeitmaymaketreatmentmoreeasilyavailable. SomeUSexpertssaiditwouldmakelittledifferencewhenitcomestohelpingpeoplewiththedisorderalthoughotherssaiditwouldbringattentiontoadisorderthatpeoplesometimesdon'trecognize.SosomeexpertsdisagreeWHO'splan. Manyofusenjoyvideogamesbutdoesplayingourfavoritegameforacoupleofhourseverynightmeanwe'resufferingfromgamingdisorder?NotaccordingtotheWHO. ThesymptomslistedbytheWHOincludealackofcontrolovergamingtreatinggamingmoreseriouslythanotherlifeinterestsanddailyactivitiesandcontinuingtoplaygamesdespitethenegativeconsequencesthatplayingthemmighthave. Thebehaviorpatternisenoughtoresultinsignificantdamagetoone'spersonalfamilyorsociallife.theWHOsaid. MeanwhileDouglasGentileofIowaStateUniversityhascarriedoutinfluentialresearchintothecauseofgamingaddictioninyoungpeople.IandmanyothershadassumedthatgamingisnotreallyaproblembutisasymptomofotherproblemshetoldNBCNews.Manyhadthoughtitwassimplyafailureofself﹣control.ToseeifitwasGentile'steamstudiedagroupofchildrenwhohadbeengamingforseveralyears.Wefoundthatwhenkidsbecameaddictedtheiranxietyincreased…andtheirgradesdecreasedGentilesaid.Whenkidswereabletobackofffromgamingtheirsymptomsdisappearedheadded. GentilethinksmedicalorganizationsshouldpayattentiontotheWHO'sproposal.Thisisn'tanissueofopinionit'sanissueofsciencehesaid.Thisisamajorscientificandmedicalorganization.Theydon'tdothingslightlyandwithoutreason. DrPetrosLevounischairofpsychiatryattheNewJerseyMedicalSchoolatRutgersUniversitysaidthathehopedtheWHO'sproposalwouldleadtomoreresearchintoobsessive过度的behavioramongalltypesofpeople. Nowthereisrenewedinterestandexcitementhesaid.SosomeexpertsareinfavourofWHO'splan. 1WhichofthefollowingisasignofgamingdisorderaccordingtotheWHO? A.Puttinggamesbeforeeverythingelse. B.Playinggamesforseveralhourseverynight. C.Havingnohobbiesbutplayinggames. D.Keepingplayinguntilwinningthegames. 2WhyisGentile'sresearchmentionedinparagraph6and7? A.Toexplainthecauseofgamingaddiction. B.Toshowtheimpactofgamingdisorder. C.ToshowthereasonsbehindtheWHO'sdecision. D.TointroducethestudythatinfluencedtheWHO'sproposal. 3What'sthearticlemainlyabout? A.TheWHOdefining下定义gamingdisorder. B.Newresearchfindingsaboutgamingdisorder. C.Thebenefitsofdefininggamingasadisease. D.Thediscussionsaboutdefininggamingdisorderasadisease.
已知数列{an}为等差数列a1＝3S5＝35数列{bn}的前n项和为Sn且3bn＝2Sn+3． 1求数列{an}和{bn}的通项公式 2设cn＝anbn求数列{cn}的前n项和Tn．
已知函数fx＝xlnx． Ⅰ求fx的最小值 Ⅱ若对所有x≥1都有fx≥ax﹣1求实数a的取值范围．
Ashewasnotallowedtohertotheshopshewroteoutalistofitemsforher. A.appointment B.accompany C.ambulance D.adjustment
Manyteensinhighschoolwanttotryoutforsportsbecausetheythinkplayingsportswillmakethemmorepopular.Buttherearelotsofother1benefitofsportsthatteensmayoverlook. WithTVmoviescomputersandvideogames2becomemoreandmorepopularithasbecomemuch3easyforteenstobehomebythemselvesratherthangoingoutwithfriends.Teensusedtohangoutatthemallordrivearoundthetownnowtheyjustsitathome.Gettingteensintoasport4givethemanopportunitytogooutandsocialize.5theymaynotfindanewbestfriendtheywilllearnhowtointeractandworkas6teamsomethingthatthey'llfind7uselaterinlife. Moreandmoreteensarebecomingoverweight.Ifteensseethattheirphysicalconditioniscausingthemtoperform8badtheymaybemotivatedtodootheractivities9gethealthy.Whenyourchildrenreachtheiryouthpartofgoodparentingwillprovidethem10thedirectionandencouragementandcontinuetohelpthemdevelopahealthystyleofliving.
Hewasoneofthe目击者tothataccident.
我国古代数学家赵爽的弦图是由四个全等直角三角形与一个小正方形拼成的一个大正方形如图．如果小正方形的面积为1大正方形的面积为25直角三角形中较小的锐角为θ那么cos2θ的值等于
已知fx是奇函数且当x＜0时fx＝﹣eax．若fln2＝8则a＝．
Themountainsarer反射映射intheclearwaterformingapleasantpicture.
Weliveinaworldwherenewtechnologiesandnewmethodsareconstantlybeingintroduced.Ashumanswearelearningmachines.Wearemostaliveandfunctioningclosesttoourpotentialwhenwearelearningadaptingadjustingandfindingnewwaysapproachesandtechniquestoimproveourlivesorthelivesofothersinsomeway. Learningdoesnotfinishwhenweleaveschool.Learningcanbecomeawayoflifethathelpsustoachieveourgreatestpotential.Weshallneverstoplearningasthereisalwayssomethingnewandinterestingtodiscover. Lifelonglearnersneverfailbecausefailureisn'tinthevocabulary.Failureisjustdefinedasafailuretolearn. WhenaprojectdoesnotgoaccordingtotheplanlifelonglearnersaskthemselvesWhatcanIlearnfromthis?andfollowupwithHowcanIdothisdifferentlyandachievemyoutcome?.TheydonotsayIdidnotgettomygoalsoImustbeafailure. ThereisawonderfulsayingTheonlywaytofailistoquit！RobertKiyosakiauthorofRichDadPoorDadsaidTheonlyreasonIamstandinguphereandyouaren'tisthatIhavefailedmoreoftenthanyouhave. Itissadbuttruethatourgreatestlessonscomefromourgreatestfailures.Theimportantthingisthelesson.Thereisnosuchthingasfailureaslongasthereisalessontobelearned. Learnsomethingneweverysingleday.Threeverygoodreasonsforbecomingalifelonglearnerincludepromotingyourbrain'shealthgivingyourlifeasenseofpurposeandpromotingyourfinancialsecurity.Anyoneofthesereasonsshouldbeenoughbutallthreecombinetoapowerfulmotivationtolearn. 1What'sthemainpurposeoflearning? A.Tolearnmoreknowledge. B.Tobedifferentfromanimals. C.Tobealearningmachine. D.Toliveabetterlife. 2Whatisfailureintheauthor'sopinion? A.Failureisthecareersetback. B.Failureisthemotherofsuccess. C.Failureislosingtheabilitytolearn. D.Failureisnotachievingone'sgoal. 3WhatconclusioncanwedrawfromRobertKiyosaki'sword? A.Nevergiveupwhenfacingfailure. B.Beconfidentthatyoucansucceed. C.Climbupbravelywhereyoufall. D.Workharduntilyoufinallysucceed. 4Whatmakesusalifelonglearner? A.Acalmstateofmind. B.Aclearlifegoal. C.Astrongathleticbuild. D.Astableincomesource.
从某企业生产的某种产品中抽取500件测量这些产品的一项质量指标值由测量结果得如下频率分布直方图 Ⅰ求这500件产品质量指标值的样本平均数和样本方差s2同一组中数据用该组区间的中点值作代表 Ⅱ由直方图可以认为这种产品的质量指标值Z服从正态分布Nμσ2其中μ近似为样本平均数σ2近似为样本方差s2． i利用该正态分布求P187.8＜Z＜212.2 ii某用户从该企业购买了100件这种产品记X表示这100件产品中质量指标值位于区间187.8212.2的产品件数利用i的结果求EX． 附≈12.2． 若Z～Nμσ2则Pμ﹣σ＜Z＜μ+σ＝0.6826Pμ﹣2σ＜Z＜μ+2σ＝0.9544．
在Rt△ABC中∠A为直角AC边所在直线的方程为x﹣2y﹣4＝0点﹣34在直线AB上斜边中点坐标为20． 1求直线BC的方程 2设圆G为Rt△ABC的外接圆若圆G上存在两点PQ使得PQ关于y轴的对称点在直线ax+y+4＝0上求a的取值范围．
AfterthedinnerIlookedatthebillandfoundthatitwas200yuanincludingthewine. A.afterall B.atall C.inall D.aboveall
Theboybrokealltheglassesonpurposehecertainlydeserved. A.topunish B.beingpunished C.tobepunished D.punish
Ialwaysfeltsorryforthepeopleinwheelchairs.Somepeopleoldandweakcannotgetaroundbythemselves.Othersseemperfectlyhealthydressedinbusinesssuits.ButwheneverIsawsomeoneinawheelchairIonlysawadisabilitynotaperson. ThenIfainted晕倒atEuroDisneyduetolowbloodpressure.ThiswasthefirsttimeIhadeverfaintedandmyparentssaidthatImustrestforawhileafterFirstAid.IagreedtotakeiteasybutasIsteppedtowardsthedoorIsawmydadpushingawheelchairinmydirection.FeelingcolorburnmycheeksIaskedhimtowheelthatthingrightbacktowherehefoundit. Icouldnotbelievethiswashappeningtome.Wheelchairswerefineforotherpeoplebutnotformeasmyfatherwheeledmeoutintothemainstreetpeopleimmediatelybegantotreatmedifferently. Littlekidsraninfrontofmeforcingmyfathertostopthewheelchairsuddenly.BitternesssetinasIwasthrownbackandforth.Stupidkids…theyhaveperfectlygoodlegs.Whycan'ttheywatchwheretheyaregoing?Ithought.Peoplestareddownatmewithpityintheireyes.Thentheywouldlookawaymaybebecausetheythoughtthesoonertheyforgotmethebetter. I'mjustlikeyou!Iwantedtoscream.Theonlydifferenceisyou'vegotlegsandIhavewheels. Peopleinwheelchairarenotstupid.Theyseeeverylookandheareachword.LookingoutatthefacesIfinallyunderstoodIwasoncejustlikethem.Itreatedpeopleinwheelchairsexactlythewaytheydidnotwanttobetreated.Irealizeditissomeofuswithtwohealthylegswhoaretrulydisabled. 1Theauthoroncewhenshewashealthy. A.showedrespectedtodisabledpeople B.lookeddownupondisabledpeople C.imaginedherselfsittinginawheelchair D.sawsomehealthypeoplemovingaroundinwheelchairs 2Facingthewheelchairforthefirsttimetheauthor. A.feltcuriousaboutit B.gotreadytomovearoundinitrightaway C.thoughtitwasreadyforherfather D.refusedtoacceptitrightaway 3Theexperienceoftheauthortellsusthat. A.lifeisthebestteacher B.peopleofteneattheirbitterfruit C.lifeissochangeablethatnobodycanpredict D.oneshouldneverdoestootherswhathewouldnotlikeothersdotohim 4Whichisthebesttitleforthispassage? A.HowtoGetUsedtoWheelchairs B.WheelchairsAreasGoodasTwoLegs C.PeoplewithTwoLegsAreTrulyHealthy D.TheDifferenceBetweenHealthyPeopleandtheDisabled
曲线＝1与曲线＝1k＜9的
Mycousinisa地位低的officerinthatcity.
已知a＝log30.3b＝30.3c＝0.33则
Hefelthappywhenhisbossstatedthathecouldsometimeforexercise. A.setabout B.setdown C.setoff D.setaside
Hefoundtheclimatethere有益的tohisillness.
假设你是新华中学的学生会__.近来随着网络的普及学生的汉字书写能力降低.为了保护传统民族文化﹣﹣汉字校学生会提出倡议.请你根据以下内容提示写一封倡议书. 内容要点 1.少上网多读书勤记笔记 2.养成练书法和写日记的习惯 3.自拟一项其它方面的内容. 注意 1.词数100左右 2.可以适当增加细节以使行文连贯 3.开头语已为你写好. 参考词汇汉字Chinesecharacter书法calligraphy Dearfriends InrecentyearsmanyofushavespentalotoftimeontheInternetwithitspopularity. TheStudentUnion
Oneofhis雄心istobecomeamusician.
WhenIwas12yearsoldIalreadyknewthatmyteenyearsweregoingtobetheworstyearsofmylife.Iwasatotaloutsiderbullied欺凌atschool.Ifeltcompletelyaloneinmysmalltown. ButbystartingtodovolunteerworkwhenIwas14Iturnedmyproblemintoapassionforhelpingothers.Theopportunitytopracticekindnessmademefeellikemylifehadagreaterpurpose.ThemorepositiveenergyIsharedthemorekindnessandappreciationIreceived.Irealizedthatmypurposeinlifewouldbetoreachouttopeoplespecificallyteenagersandhelpthemfeellessalone. Booksweremytruefriendsbackthen.Iwassothankfulthattheauthorswrotethosebooks.Thekindnesstheyofferedmewiththeirbookssavedmylife.OneofmybiggestdreamswastobecomeanauthorsoIcouldwritebooksthatwouldhelpotherteenagersthewaythosebookshelpedme. AftersurvivingterribleexperiencesatschoolandathomeImadeachoicetotaketheoptimisticpositiveroadinthenextstepsofmyjourney.MydreamcareeroneIthoughtwasonlypossiblefortheauthorsIlovediswhatIamdoingnow.Ihavebeenafull﹣timeauthorofteennovelssince2007andamgratefulforthisamazingopportunitytoreachouttoreaderseverysingleday. KindnesssavedmewhenIneededhelpthemost.Evensmallactsofkindnesscanchangesomeone'slife.Youneverknowwhatsomeoneelseisgoingthrough.Butbypracticingdailykindnessyoubecomeanarchitectofpositivechange. 1Whatwastheauthor'slifelikewhenhewas12? A.Boring. B.Peaceful. C.Unhappy. D.Meaningful. 2Howdidthevolunteerworkbenefittheauthor? A.Itmadehimpopularinhistown. B.Ithelpedhimfindthemeaningoflife. C.Ithelpedhimunderstandothers'livesbetter. D.Ithelpedtoshapehisdreamcareer. 3Whydidtheauthorchoosewritingashisjob? A.Hewasinspiredbyhisteacher. B.Hecouldpasspositiveenergytoreaders. C.Hewantedtosharehisschoolexperiences. D.Hefoundhehadatalentforwriting. 4Whatdoestheauthorsuggestreadersdointhelastparagraph? A.Say‘no'tobulliesbravely. B.Makepositivechangesintheirlives. C.Treatotherswithkindnessindailylife. D.Learntocaremoreaboutothers'feelings.
已知抛物线y2＝4x的焦点为F准线为l．若l与双曲线﹣＝1a＞0b＞0的两条渐近线分别交于点A和点B且|AB|＝4|OF|O为原点则双曲线的离心率为
设p“方程x2+y2＝a+4表示圆”q“方程＝1表示焦点在x轴上的双曲线”如果“p∧q”是假命题且“p∨q”是真命题求实数a的取值范围．
在各项均为正数的等比数列{an}中若log2a2+log2a8＝1则a3•a7＝．
在等差数列{an}中若a6+a8+a10＝72则2a10﹣a12的值为
Oncetherewasaverybrilliantcreativeandlearnedman.Hegainedmuch1whiletravelingthroughouttheworld.Unfortunatelyhelosthislegsandleftarminatrafficaccidentleavingonlyafingerandthumbonhisrighthand.Hebecameso2thathewasafraidhewouldspendhislife3andwouldnolongerbeabletousehislifeinan4way. Onedayherememberedhowhehadalwayslovedgetting5.Herealizedthathestillhadpartial6ofhisrighthandandcouldwritewith7.Thenhehadanidea.Whynotwritetootherpeoplewhoneedencouragement? He8wherehecouldfindthosewhocouldbeencouragediftheyreadhisletters.Hethoughtofpeoplein9.Manyofthemhadhopeofregainingtheir10.Otherswouldkeepfeelingdepressedandremainputawayfortherestoftheirlives.Hedecidedthathemusttryto11them.Sohewrotetoaprisonministryaboutsendingletterstotheprisoners.Theprisonministerrepliedthatwritingtotheprisonerswouldbe12.Howeveritwouldbeagainstprisonrulesfortheprisonerstowriteback. 13withtheintentionthemanbegansending14messagesofGod'slovehopestrengthandencouragement.Hewrotetwiceaweektestinghisstrengthandabilitytothe15.Hepouredhisheartandsoulintohiswords16hisexperiencesenseofhumoroptimismandfaith. Itwasdifficulttowritethoselettersespeciallywithouthopeofany17.Frequentlyhefeltdiscouragedwonderingifanyone18readhisletters.Howeverthiswashis19chancesohedeterminedtocontinue. AtlasthereceivedaletterfromtheprisonofficerwhichsaidPleasewriteonthebestpaperyoucanafford.Yourlettersarepassedfromcell牢房tocelluntiltheyalmostfallto20! Weallhaveuniqueexperiencesabilitiesandtalents.Wecandiscoverwaystoreachothersinneedofencouragementandstrength. 1A.wealth B.faith C.confidence D.experience 2A.depressed B.embarrassed C.ashamed D.thrilled 3A.writing B.suffering C.weeping D.wandering 4A.abnormal B.regular C.comfortable D.meaningful 5A.letters B.e﹣mails C.presents D.prizes 6A.sense B.strength C.shape D.function 7A.affection B.caution C.difficulty D.confidence 8A.estimated B.doubted C.assumed D.wondered 9A.hospitals B.prisons C.churches D.charities 10A.families B.letters C.freedom D.conscience 11A.release B.reach C.defend D.know 12A.acceptable B.reasonable C.forbidden D.considered 13A.Faced B.Satisfied C.Filled D.Impressed 14A.holy B.daily C.one﹣way D.round﹣way 15A.point B.worst C.degree D.limit 16A.sharing B.learning C.gaining D.enriching 17A.success B.reply C.help D.progress 18A.curiously B.patiently C.carefully D.actually 19A.only B.better C.extra D.lost 20A.ruin B.theground C.pieces D.thebottom
ThefatheraswellashisthreesonsskatingonthefrozenrivereverySundayafternooninwinter. A.isgoing B.go C.goes D.aregoing
热门题库
更多
高二下学期化学
高二下学期生物
高三下学期生物
高三下学期化学
高三上学期英语
高二下学期英语
教案备课库
高三下学期英语
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
国际法
教案备课库
教案备课库
湘公网安备 43130202000226号