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磷是土壤有机质的重要组成元素，也是植物生长的营养元素。土壤水分增加有利于磷累积，气温升高和流水侵蚀会减少土壤中磷累积量。图2示意我国四川西部某山地东坡土壤中磷累积量的垂直变化，据此完成10~11...
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高考生物《单项选择题》真题及答案
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土壤有机质对土壤肥力有哪些作用怎样合理调节土壤有机质
磷是土壤有机质的重要组成元素也是植物生长的营养元素土壤水分增加有利于磷累积气温升高和流水侵蚀会
大气温度较低
生物生产量较低
土壤含水量较低
地表径流量较小
磷是土壤有机质的重要组成元素也是植物生长的营养元素土壤水分增加有利于磷累积气温升高和流水侵蚀会
高山草甸带
高山冰雪带
山地针阔叶混交林带
常绿阔叶林带
土壤有机质在土壤肥力形成中有何作用如何提高土壤有机质的含量
土壤有机质的含量决定于年和年的相对大小当二者相等时土壤有机质含量保持不变当前者大于后者时土壤有机质含
简述土壤有机质的作用可以采取哪些措施增加土壤有机质的含量
有机质是微量元素的重要来源通常情况下随着土壤有机质含量的增加其土壤微量元素含量也同步增加因此增施有机
土壤有机质在土壤中的作用是怎样的土壤有机质在土壤肥力中的作用
土壤有机质能改善土壤的物理和化学性质有利于土壤团粒结构的形成从而促进植物的生长和养分的吸收
依据土壤检测第6部分土壤有机质的测定NY／T1121.6-2006测定土壤有机质含量时若待测土壤有机
磷是土壤有机质的重要组成元素也是植物生长的营养元素土壤水分增加有利于磷累积气温升高和流水侵蚀会
高山草甸带
高山冰雪带
山地针阔叶混交林带
常绿阔叶林带
土壤中存在于生物区系中的有机磷往往低于土壤有机质的有机磷
土壤有机质的组成
土壤有机质和腐殖质是两个不同的概念土壤有机质是腐殖质的一个组成成分
下图反映了生物与环境的相互作用过程判断问题图中腐殖对植物生长的作用主要体现在
释放钾、磷、钙等养分元素，供植物吸收
增加土壤空隙、保证充足的空气
释放以氮为主的养分，供植物直接吸收
增加土壤有机质含量，供植物直接吸收
土壤有机质在改善土壤性质调节土壤肥力上有作用
土壤有机质可以提高土壤的供肥性
土壤有机质可以提高土壤的保肥性，因而可提高化肥利用率
土壤有机质可以改良土壤的多种物理性状
促进植物生长发育
有助于消除土壤污染，提高土壤自净能力
土壤有机质有何作用?如何增加土壤有机质
林下植物是土壤有机质的来源之一
影响土壤有机质转化的因素是这些因素都会影响土壤有机质的转化方向速度和产物
土壤有机质的矿质化过程是释放养分的过程铁硼镁铜均是花卉植物所需的微量元素
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听第7段材料回答第89题听力内容暂无Whatistheprobablerelationshipbetweenthespeakers?
听下面5段对话每段对话后有一个小题从题中所给的ABC三个选项中选出最佳选项并标在试卷的相应位置听完每段对话后你都有10秒钟的时间来回答有关小题和阅读下一小题每段对话仅读一遍 例Howmuchistheshirt A.£19.15B.£9.18C.£9.15 答案是C 听力内容暂无 Whatisthewomangoingtodo?
阅读下列短文从每题所给的四个选项ABC和D中选出最佳选项并在答题卡上将该项涂黑 B GrandparentsAnsweraCall AsathirdgenerationnativeofBrownsvilleTexasMildredGarzaneverpleasedmoveaway.EvenwhenherdaughterandsonaskedhertomovetoSanAntoniotohelptheirchildrenshepolitelyrefused.OnlyafterayearoffriendlydiscussiondidMsGaffinallysayyes.Thatwasfouryearsago.Todayallthreegenerationsregardthemovetoasuccessgivingthemacloserrelationshipthantheywouldhavehadinseparatecities. NostatisticsshowthenumberofgrandparentslikeGarzawhoaremovingclosertothechildrenandgrandchildren.Yetthereisevidencesuggestingthatthetrendisgrowing.EvenPresidentObama’smother-in-lawMarianRobinsonhasagreedtoleaveChicagoandintotheWhiteHousetohelpcareforhergranddaughters.Accordingtoastudygrandparentscom.83percentofthepeoplesaidMrs.Robinson‘sdecisionwillinfluencethegrandparentsintheAmericanfamily.Two-thirdsbelievemorefamilieswillfollowtheexampleofObama’sfamily. inthe1960swewereallalittlewildandcouldn’tgetawayfromhomefarenoughfsstenoughtoprovewecoulddoitonourownsaysChristineCrosbypublisherofgratemanazineforgrandparents.Wenowrealizehowimportantfamilyisandhowimportanttobenearthemespeciallywhenyou’rerainingchildren. Movingisnotforeveryone.Almosteverygrandparentwantstobewithhisorhergrandchildrenandiswillingtomakesacrificesbutsometimesitiswisertosaynoandvisitfrequentlyinstead.Havingyourgrandchildrenfarawayishardespeciallyknowingyouradultchildisstrugglingbutgivingupthelifeyouknowmaybeharder. Whatdoestheauthorsuggestthegrandparentsdointhelasrparagraph?
阅读下列短文从每题所给的四个选项ABC和D中选出最佳选项并在答题卡上将该项涂黑 B GrandparentsAnsweraCall AsathirdgenerationnativeofBrownsvilleTexasMildredGarzaneverpleasedmoveaway.EvenwhenherdaughterandsonaskedhertomovetoSanAntoniotohelptheirchildrenshepolitelyrefused.OnlyafterayearoffriendlydiscussiondidMsGaffinallysayyes.Thatwasfouryearsago.Todayallthreegenerationsregardthemovetoasuccessgivingthemacloserrelationshipthantheywouldhavehadinseparatecities. NostatisticsshowthenumberofgrandparentslikeGarzawhoaremovingclosertothechildrenandgrandchildren.Yetthereisevidencesuggestingthatthetrendisgrowing.EvenPresidentObama’smother-in-lawMarianRobinsonhasagreedtoleaveChicagoandintotheWhiteHousetohelpcareforhergranddaughters.Accordingtoastudygrandparentscom.83percentofthepeoplesaidMrs.Robinson‘sdecisionwillinfluencethegrandparentsintheAmericanfamily.Two-thirdsbelievemorefamilieswillfollowtheexampleofObama’sfamily. inthe1960swewereallalittlewildandcouldn’tgetawayfromhomefarenoughfsstenoughtoprovewecoulddoitonourownsaysChristineCrosbypublisherofgratemanazineforgrandparents.Wenowrealizehowimportantfamilyisandhowimportanttobenearthemespeciallywhenyou’rerainingchildren. Movingisnotforeveryone.Almosteverygrandparentwantstobewithhisorhergrandchildrenandiswillingtomakesacrificesbutsometimesitiswisertosaynoandvisitfrequentlyinstead.Havingyourgrandchildrenfarawayishardespeciallyknowingyouradultchildisstrugglingbutgivingupthelifeyouknowmaybeharder. WhatwasthereactionofthepublictoMrs.Robinson’sdecision?
阅读下面短文从短文后各题所给的四个选项ABC和D中选出可以填入空白处的最佳选项并在答题卡上将该项涂黑学科&网 Hundredsofpeoplehaveformedimpressionsofyouthroughthatlittledevice装置onyourdesk.Andthey’veneveractually 41 you.Everythingtheyknowaboutyou 42 throughthisdevicesometimesfromhundredsofmilesaway. 43 theyfeeltheycanknowyou 44 fromthesoundofyourvoice.That’showpowerfulthe 45 is. Powerfulyesbutnotalways 46 .ForyearsIdealtwithmytravelagentonlybyphone.RanimyfacelessagentwhomI’dnevermet 47 gotmerock-bottompricesonairfarescarsandhotels.Buthercoldvoicereally 48 me.Isometimeswishedto 49 anotheragent. OnemorningIhadto 50 animmediateflighthomeforafamilyemergency.IranintoRani’soffice 51 .Thewomansittingatthedesk 52 mymadnesssympatheticallyjumpedup.Shegavemea 53 smilenoddedwhilelisteningpatientlyandthenprintedoutthe 54 immediately.Whatawonderfullady!Ithought. Rushingout 55 IcalledoutovermyshoulderBythewaywhat’syourname?I’mRanishesaid.Iturnedaroundandsawa 56 womanwithabigsmileonherfacewavingtowishmeasafetrip.Iwas 57 !WhyhadIthoughtshewascold?Raniwaswellso 58 . SittingbackinthecaronthewaytotheairportIfigureditallout.Rani’s 59 ---herwarmsmilehernodsher‘I’mhereforyou’ 60 ---wereallsilentsignalsthatdidn’ttravelthroughwires. 59
听下面5段对话或独白每段对话或独白后有几个小题从题中所给的ABC三个选项中选出最佳选项并标在试卷的相应位置听每段对话或独白前你将有时间阅读各个小题每小题5秒钟听完后各小题将给出5秒钟的作答时间每段对话或独白读两遍 听第8段材料回答第10至12题 Howmuchwillthewomanpayherroompernight?
听下面5段对话每段对话后有一个小题从题中所给的ABC三个选项中选出最佳选项并标在试卷的相应位置听完每段对话后你都有10秒钟的时间来回答有关小题和阅读下一小题每段对话仅读一遍 例Howmuchistheshirt A.£19.15B.£9.18C.£9.15 答案是C 听力内容暂无 Wheredoestheconversationprobablytakeplace?
假定英语课上老师要求同桌之间交换修改作文请你修改你同桌写的以下作文文中共有10处语言错误每句中最多有两处每处错误仅涉及一个单词的增加删除或修改 增加在缺词处加一个漏字符号∧并在其下面写出该加的词 删除把多余的词用斜线﹨划掉 删除在错的词下划一横线并在该词下面写出修改后的词 注意1．每处错误及其修改均仅限一词 2．只允许修改10处多者从第11处起不计分 Thesummerholidayiscoming.MyclassmatesandIaretalkingabouthowtododuringtheholiday.Wecanchosebetweenstayingathomeandtakeatrip.Ifwestayathomeitiscomfortablebutthereisnoneedtospendmoney.Butinthatcasewewilllearnlittleaboutworld.Ifwegoonatripabroadwecanbroadenyouviewandgainknowledgeswecannotgetfrombooks.Someclassmatessuggestwecangotoplacesofinterestnearby.Ithoughtthatitisagoodidea.Itdoesnotcostmanyyetwecanstilllearnalot. 9
阅读下面材料在空白处填入适当的内容1个单词或括号内单词的正确形式 Ifyoufeelstressedbyresponsibilitiesatworkyoushouldtakeastepbackandidentify识别thoseof 61 greatandlessimportance.Thenhandlethemostimportanttasksfirstsoyou’llfeelarealsenseof 62 achieve.Leavingthelessimportantthingsuntiltomorrow 63 beoftenacceptable. Mostofusaremorefocused 64 ourtasksinthemorningthanwearelaterintheday.Sogetanearlystartandtrytobeasproductive 65 possiblebeforelunch.Thiswillgiveyoutheconfidenceyouneedtogetyouthroughtheafternoonandgohomefeelingaccomplished. Recent 66 studyshowthatwearefarmoreproductiveatworkifwetakeshortbreaks 67 regular.Giveyourbodyandbrainarestbysteppingoutsidefor 68 whileexercisingordongsomethingyouenjoy. Ifyoufindsomethingyoulovedoingoutsideoftheofficeyou’llbelesslikely 69 bringyourworkhome.Itcouldbeanything-gardeningcookingmusicsports—butwhateveritis 70 makesureit’sarelieffromdailystressratherthananotherthingtoworryabout. 69
假定你是李华你校摄影俱乐部photographyclub将举办国际中学摄影展请给你的英国朋友Peter写封信请他提供作品信的内容包括 1．主题环境保护 2．展览时间 3．投稿邮箱intlphotoshow@gmschool.com. 注意 1．词数100左右 2．可以适当增加细节以使行文连贯
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听下面5段对话或独白每段对话或独白后有几个小题从题中所给的ABC三个选项中选出最佳选项并标在试卷的相应位置听每段对话或独白前你将有时间阅读各个小题每小题5秒钟听完后各小题将给出5秒钟的作答时间每段对话或独白读两遍 听第9段材料回答第13至16题 WhatdoesthewomanthinkofGordon’scomingweekend?
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听第6段材料回答第67题听力内容暂无Whatisthemangoingtodothissummer?
阅读下列短文从每题所给的四个选项ABC和D中选出最佳选项并在答题卡上将该项涂黑 D Themeaningofsilencevariesamongculturalgroups.Silencesmaybethoughtfulortheymaybeemptywhenapersonhasnothingtosay.Asilenceinaconversationmayalsoshowstubbornnessorworry.Silencemaybeviewedbysomeculturalgroupsasextremelyuncomfortable;thereforeattemptsmaybemadetofilleverygap间隙withconversation.Personsinotherculturalgroupsvaluesilenceandviewitasnecessaryforunderstandingaperson'sneeds. ManyNativeAmericansvaluesilenceandfeelitisabasicpartofcommunicatingamongpeoplejustassometraditionalChineseandThaipersonsdo.Thereforewhenapersonfromoneoftheseculturesisspeakingandsuddenlystopswhatmaybeimplied暗示isthatthepersonwantsthelistenertoconsiderwhathasbeensaidbeforecontinuing.Intheseculturessilenceisacallforreflection. Otherculturesmayusesilenceinotherwaysparticularlywhendealingwithconflictsamongpeopleorinrelationshipsofpeoplewithdifferentamountsofpower.ForexampleRussianFrenchandSpanishpersonsmayusesilencetoshowagreementbetweenpartiesaboutthetopicudnerdiscussion.HoweverMexicansmayusesilencewheninstructionsaregivenbyapersoninauthorityratherthanberudetothatpersonbyarguingwithhimorher.InstillanotherusepersonsinAsianculturesmayviewsilenceasasignofrespectparticularlytoanelderorapersoninauthority. Nursesandothercare-geiversneedtobeawareofthepossiblemeaningsofsilencewhentheycomeacrossthepersonalanxietytheirpatientsmaybeexpericencing.Nursesshouldrecognizetheirownpersonalandculturalconstructionofsilencesothatapatient’ssilenceisnotinterruptedtooearlyorallowedtogoonunnecessarily.Anursewhounderstandsthehealing治愈valueofsilencecanusethisunderstandingtoassistinthecareofpatientsfromtheirownandfromothercultures. Whatdoestheauthorsayaboutsilenceinconversations?
听下面5段对话或独白每段对话或独白后有几个小题从题中所给的ABC三个选项中选出最佳选项并标在试卷的相应位置听每段对话或独白前你将有时间阅读各个小题每小题5秒钟听完后各小题将给出5秒钟的作答时间每段对话或独白读两遍 听第10段材料回答第17至20题 Whyareengineeringgraduatesmorelikelytoacceptajob?
假定英语课上老师要求同桌之间交换修改作文请你修改你同桌写的以下作文文中共有10处语言错误每句中最多有两处每处错误仅涉及一个单词的增加删除或修改 增加在缺词处加一个漏字符号∧并在其下面写出该加的词 删除把多余的词用斜线﹨划掉 删除在错的词下划一横线并在该词下面写出修改后的词 注意1．每处错误及其修改均仅限一词 2．只允许修改10处多者从第11处起不计分 Thesummerholidayiscoming.MyclassmatesandIaretalkingabouthowtododuringtheholiday.Wecanchosebetweenstayingathomeandtakeatrip.Ifwestayathomeitiscomfortablebutthereisnoneedtospendmoney.Butinthatcasewewilllearnlittleaboutworld.Ifwegoonatripabroadwecanbroadenyouviewandgainknowledgeswecannotgetfrombooks.Someclassmatessuggestwecangotoplacesofinterestnearby.Ithoughtthatitisagoodidea.Itdoesnotcostmanyyetwecanstilllearnalot. 1
假定英语课上老师要求同桌之间交换修改作文请你修改你同桌写的以下作文文中共有10处语言错误每句中最多有两处每处错误仅涉及一个单词的增加删除或修改 增加在缺词处加一个漏字符号∧并在其下面写出该加的词 删除把多余的词用斜线﹨划掉 删除在错的词下划一横线并在该词下面写出修改后的词 注意1．每处错误及其修改均仅限一词 2．只允许修改10处多者从第11处起不计分 Thesummerholidayiscoming.MyclassmatesandIaretalkingabouthowtododuringtheholiday.Wecanchosebetweenstayingathomeandtakeatrip.Ifwestayathomeitiscomfortablebutthereisnoneedtospendmoney.Butinthatcasewewilllearnlittleaboutworld.Ifwegoonatripabroadwecanbroadenyouviewandgainknowledgeswecannotgetfrombooks.Someclassmatessuggestwecangotoplacesofinterestnearby.Ithoughtthatitisagoodidea.Itdoesnotcostmanyyetwecanstilllearnalot. 7
阅读下列短文从每题所给的四个选项ABC和D中选出最佳选项并在答题卡上将该项涂黑 D Themeaningofsilencevariesamongculturalgroups.Silencesmaybethoughtfulortheymaybeemptywhenapersonhasnothingtosay.Asilenceinaconversationmayalsoshowstubbornnessorworry.Silencemaybeviewedbysomeculturalgroupsasextremelyuncomfortable;thereforeattemptsmaybemadetofilleverygap间隙withconversation.Personsinotherculturalgroupsvaluesilenceandviewitasnecessaryforunderstandingaperson'sneeds. ManyNativeAmericansvaluesilenceandfeelitisabasicpartofcommunicatingamongpeoplejustassometraditionalChineseandThaipersonsdo.Thereforewhenapersonfromoneoftheseculturesisspeakingandsuddenlystopswhatmaybeimplied暗示isthatthepersonwantsthelistenertoconsiderwhathasbeensaidbeforecontinuing.Intheseculturessilenceisacallforreflection. Otherculturesmayusesilenceinotherwaysparticularlywhendealingwithconflictsamongpeopleorinrelationshipsofpeoplewithdifferentamountsofpower.ForexampleRussianFrenchandSpanishpersonsmayusesilencetoshowagreementbetweenpartiesaboutthetopicudnerdiscussion.HoweverMexicansmayusesilencewheninstructionsaregivenbyapersoninauthorityratherthanberudetothatpersonbyarguingwithhimorher.InstillanotherusepersonsinAsianculturesmayviewsilenceasasignofrespectparticularlytoanelderorapersoninauthority. Nursesandothercare-geiversneedtobeawareofthepossiblemeaningsofsilencewhentheycomeacrossthepersonalanxietytheirpatientsmaybeexpericencing.Nursesshouldrecognizetheirownpersonalandculturalconstructionofsilencesothatapatient’ssilenceisnotinterruptedtooearlyorallowedtogoonunnecessarily.Anursewhounderstandsthehealing治愈valueofsilencecanusethisunderstandingtoassistinthecareofpatientsfromtheirownandfromothercultures. Whatdoestheauthoradvisenursestodoaboutsilence?
阅读下面材料在空白处填入适当的内容1个单词或括号内单词的正确形式 Ifyoufeelstressedbyresponsibilitiesatworkyoushouldtakeastepbackandidentify识别thoseof 61 greatandlessimportance.Thenhandlethemostimportanttasksfirstsoyou’llfeelarealsenseof 62 achieve.Leavingthelessimportantthingsuntiltomorrow 63 beoftenacceptable. Mostofusaremorefocused 64 ourtasksinthemorningthanwearelaterintheday.Sogetanearlystartandtrytobeasproductive 65 possiblebeforelunch.Thiswillgiveyoutheconfidenceyouneedtogetyouthroughtheafternoonandgohomefeelingaccomplished. Recent 66 studyshowthatwearefarmoreproductiveatworkifwetakeshortbreaks 67 regular.Giveyourbodyandbrainarestbysteppingoutsidefor 68 whileexercisingordongsomethingyouenjoy. Ifyoufindsomethingyoulovedoingoutsideoftheofficeyou’llbelesslikely 69 bringyourworkhome.Itcouldbeanything-gardeningcookingmusicsports—butwhateveritis 70 makesureit’sarelieffromdailystressratherthananotherthingtoworryabout. 61
根据短文内容从短文后的选项中选出能填入空白处的最佳选项选项中有两项为多余选项 Secretcodes密码keepmessagesprivateBankscompaniesandgovernmentagenciesusesecretcodesindoingbusinessespeciallywheninformationissentbycomputer. Peoplehaveusedsecretcodesforthousandsofyears.36Codebreakingneverlags落后farbehindcodemaking.Thescienceofcreatingandreadingcodedmessagesiscalledcryptography. Therearethreemaintypesofcryptography.37Forexamplethefirstlettersof“Myelephanteatstoomanyeels”Spelloutthehiddenmessage“Meetme.” 38YoumightrepresenteachletterwithanumberForexampleLet’snumberthelettersofthealphabetinorderfrom1to26.Ifwesubstituteanumberforeachletterthemessage“Meetme”wouldread“13520135.” Acodeusessymbolstoreplacewordsphrasesorsentences.Toreadthemessageofarealcodeyoumusthaveacodebook.39Forexample”bridge“mightstandfor“meet”and“out”mightstandfor“me.”Themessage“bridgeout”wouldactuallymean“Meetme.”40Howeveritisalsohardtokeepacodebooksecretforlong.Socodesmustbechangedfrequently. 36
阅读下列短文从每题所给的四个选项ABC和D中选出最佳选项并在答题卡上将该项涂黑 A YouprobablyknowwhoMarieCuriewasbutyoumaynothaveheardofRachelCarson.Oftheoutstandingladieslistedbelowwhodoyouthinkwasthemostimportantwomanofthepast100years? JaneAddams1860-1935 AnyonewhohaseverbeenhelpedbyasocialworkerhasJaneAddamstothank.Addanshelpedthepoorandworkedforpeace.Sheencouragedasenseofcommunity社区bycreatingsheltersandpromotingeducationandservicesforpeopleinneedIn1931AddamsbecamethefirstAmericanwomantowintheNobelPeacePrize. RachelCarson1907-1964 Ifitweren’tforRachelCarsontheenvironmentalmovementmightnotexisttoday.Herpopular1962bookSilentSpringraisedawarenessofthedangersofpollutionandtheharmfuleffectsofchemicalsonhumansandontheworld’s lakesandoceans. SandraDayO’Connor1930-present WhenSandraDayO’ConnorfinishedthirdinherclassatStanfordLawSchoolin1952shecouldnotfindworkatalawfirmbecauseshewasawoman.ShebecameanArizonastatesenator参议员andin1981thefirstwomantojointhe U.S.SupremeCourt.O’Connorgavethedecidingvoteinmanyimportantcasesduringher24yearsonthetopcourt. RosaParks1913-2005 OnDecember11955inMontgomeryAlabamaRasaParkswouldnotgiveupherseatonabustoapassenger.HersimpleactlandedParksinprison.ButitalsosetlfftheMontgmerybusboycott.Itlastedformorethanayearandkickedoffthecivil-rightsmovement.TheonlytiredIwaswastiredlrgivinginsaidParks. WhatisthereasonforO’Connor’sbeingrejectedbythelawfirm?
听下面5段对话或独白每段对话或独白后有几个小题从题中所给的ABC三个选项中选出最佳选项并标在试卷的相应位置听每段对话或独白前你将有时间阅读各个小题每小题5秒钟听完后各小题将给出5秒钟的作答时间每段对话或独白读两遍 听第8段材料回答第10至12题 Whydoesthewomanmakethecall?
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