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用化学用语回答下列问题．磷元素 ；
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从C.HONSNaP几种元素中选择恰当的元素按下列要求用化学用语表示1醋酸中的阴离子________
用化学用语回答下列问题1三个亚铁离子2两个五氧化二磷分子3过氧化氢中氢元素的化合价4碳酸根离子.
化学用语是我们学习化学的重要工具请完成下列空格⑴用化学符号填空①4个硫原子________②3个铝离
化学用语能准确简洁地记录表达交流化学信息请你用正确的化学用语即化学符号填空13个氮原子2保持水的化学
用化学用语表示5个磷原子_____________硝酸铝_____________最高价硫元素的氧化
用化学用语填空氢元素____五氧化二磷中磷元素的化合价______2个氮分子_______钙离子__
用化学用语回答下列问题 1两个氧分子2生理盐水中的溶剂是3五氧化二磷中磷元素化合价．
.请用化学用语回答下列问题5分1地壳中含量最多的非金属元素是________2磷元素是_______
用化学用语填空1磷元素2个硫酸根离子2个一氧化碳分子2下图是A.B.C.D.四种粒子的结构示意图回答
用恰当的化学用语回答下列问题⑴两个氢分子________2n个硫酸根离子_______3五氧化二氮中
化学用语是化学的特有的语言是学习化学的基础请回答下列问题1请指明下列符号中数字2的含义2OCO2Mg
用化学用语填空氢元素____五氧化二磷中磷元素的化合价______2个氮分子_______钙离子__
用化学用语表示下列含义1钾原子22个铝离子33个酒精分子4五氧化二磷中磷元素为+5价
用化学用语回答下列问题.1人体缺乏后会引起贫血的元素2碳酸根离子3医用酒精中溶质的化学式.
回答下列问题1用化学用语填空①氧元素②硫酸钠中的阳离子③氯化铝④2个五氧化二磷分子2①Fe2+中2表
请回答下列问题1用化学用语表示2个硫原子氧化镁2硝酸钙中钙元素的化合价为
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用化学用语回答下列问题两个亚铁离子地壳中含量最多的金属元素二个氢气分子钠离子的结构示意图
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Weoftenhearchildrenwishingtheyweregrown﹣ups.Andoldpeoplewishtheywere1again.Eachagehasits2anditspainsandthehappiestpersonalwaysenjoyswhateachage3himwithoutwastinghistimeinuselessregrets. Childhoodisatimewhenthereare4responsibilitiestomakelifebetter.Ifachildhasgood5heisraisedlookedafterandlovedwhateverhemaydo.Itis6thathewilleveragaininhislifebegivensomuchwithouthavingtodoanythinginreturn.Butachildhas7pains.Heisnotso8todoallthathewishestodo.Heisagainandagainbeingtoldnottodosomethingorbeingpunishedfor9hehaswronglydone. Whenayoungmanstartstoearnhisownliving谋生hecannolongerexpectothersto10hisfoodhisclothesandhisroombuthehastoworkifhewantstolive11.Ifhespendsmostofhistime12inthewaysthatheusedtoasachildhewillgohungry.Andifhebreaksthelawsofsociety13heusedtobreakthelawsofhisparentshemaygotoprison监狱.14ifheworkshardkeepsoutoftroubleandhasgoodhealthhecanhavegreathappiness.Hecanalsobuilduphisownpositionin15forhimself. 1.A.new B.young C.active D.strong 2.A.loneliness B.wishes C.sadness D.pleasure 3.A.lets B.hopes C.makes D.gives 4.A.few B.many C.little D.much 5.A.friends B.parents C.teachers D.sisters 6.A.impossible B.natural C.common D.harmful 7.A.its B.your C.her D.his 8.A.free B.weak C.wrong D.right 9.A.when B.what C.that D.who 10.A.thinkabout B.payfor C.talkabout D.puton 11.A.comfortably B.freely C.peacefully D.sadly 12.A.playing B.thinking C.worrying D.writing 13.A.since B.as C.and D.but 14.A.Luckily B.Possibly C.Unluckily D.However 15.A.society B.school C.home D.office
Courageistheabilitytobebraveindifferentsituationsinourlife.Hereandtherenowandtheneveryoneneedscouragetodosomethingwell.Couragemaymakeyouconfidentofyoursuccess.Ifyouhavecourageyouwillnotshowfearinfaceofanythingdifficultordangerous.Withcourageyoumaylookatsomeoneintheeyewhoyouhavewronged冤枉andsayIamsorryyoumaykeepsmilingevenifyouareseriouslyillandknowyouareattheendofyourlife. Howcanwebuildupourcourage? 阅读以上信息用恰当的词完成下面的短文每空一词. Courageistheabilitytobebraveindifferentsituations.Itisimportanttoeveryone.Withcourageyouwillfeelconfidentofyoursuccesswithcourageyouwon'tbe56ofanythingdifficultordangerouswithcourageyoumaylookatsomeoneyouhavewrongedintheeyeandsaysorrytohimorherwithcourageyoumaykeepsmilingevenifyouareseriouslyill. Herearesomeuseful57tobuildupourcourage. Firstbelievethatyou'll58.Takechancesandknowthatyouhaveyourowntalents. Secondexerciseyourcourage.It'sjustlikethemuscle.Themoreweusecouragethe59 wewillget. Thirddon't60togiveupalthoughit'smucheasiertodosoandyouneedcouragetosayordowhatyouthinkisrightevenwhenothersthinkyouarewrong. Finallyreadinspiringstoriesofbravepeople.AbrahamLincolnissuchakindofperson. 56. 57. 58. 59. 60.
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下图所示的四个图象能正确反映对应变化关系的是A．①等质量的木炭分别在足量的空气中和氧气中燃烧B．②铜片在空气中加热C．③加热一定量的氯酸钾和二氧化锰的混合物制取氧气D．④20℃时向一定量接近饱和的氯化钾溶液中加入氯化钾固体
Ourchildrenandgrandchildrenmaynothaveachancetovisitmanyofthemostfamousplacesaroundtheworld.Warweatheragetrafficandpollutiondamage破坏thesefamousplaces.Ifwedonothingtheymayevennolongerremain.Butlookingaftertheseplacesoftencostsmorethanonecountrycanafford. Intheearly1970sworldgovernmentsdecidedthatiftheyjoinedtogethertheywouldbeabletopreserve保护ourhistory.Ifeverycountrypaidsomemoneytheysaiditwouldbepossibletolookafterimportanthistoricplaces.ForthisreasoncountriesaroundtheworldunitedtoformtheWorldHeritageOrganizationin1972.Todaytheorganizationhelpstoprotectandrebuildthemostimportantplacesfromourhistory. Howeveroneofthebiggestproblemsforhistoricplacesisvandalism.Thatistosaypeoplesometimesentertheseplacesanddamagethebuildings.AtsomeplacessuchasStonehengeinEnglandgovernmentshavebuilthighfencestoprotectitfromvandals. Therearemanydifferentideasabouthowtosolvetheproblemofvandalism.Someprofessorssaythatifguardskeepwalkingaroundtheseplacesvandalswon'tbeabletogetin.Someprofessorssaythatiftheyfixmoretelevisioncamerastheywon'tneedsomanyguards.Otherssaythatthebestwayiseducation.Ifpeoplelearntorespecthistorytheywon'tdamageit.Theywillalsowanttospendmoneylookingafteroldplaces.ForthisreasontheWorldHeritageOrganizationhelpstospreadinformationaboutthevalueofhistoricplaces. 32.Ourchildrenandgrandchildrenmaynothaveachancetovisitmanyofthemostfamousplacesaroundtheworldprobablybecause. A.theydon'thaveenoughmoneytogothere B.theseplacesmaydisappearinthefuture C.governmentsdon'tallowthemtoenter D.theyareafraidoftheguardsthere 33.TheWorldHeritageOrganizationwassetupforthefollowingreasonsEXCEPT. A.Itwouldbeabletohelppreserveourhistory. B.Nocountrieswantedtoprotectthehistoricplaces. C.Itwouldcollectmoneytorebuildthedamagedplaces. D.Itwouldbepossibletotakecareofimportanthistoricplaces. 34.Whichofthefollowingshowsustheactionofvandalism? A.Peopleentertheplacesanddamagethebuildings. B.Governmentsbuildhighfencestoprotecttheplacefromvandals. C.Guardswalkaroundtheseplacesandfixmoretelevisioncameras. D.Warweatheragetrafficandpollutiondamagethesefamousplaces. 35.What'sthebestwaytosolvethebiggestproblemofvandalism? A.Tospendmoremoneylookingaftertheseplaces. B.Tomakeguardspreventvandalsgettingin. C.Tofixmoretelevisioncamerasintheseplaces. D.Tomakepeopleknowaboutthevalueofhistoricplaces.
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