专题35不等式（同步练习）一、判断两个数的大小和不等式证明例1-1．已知、为正数,且,比较与。变式1-1-1．比较与的大小,其中。变式1-1-2．比较与的大小,其中。例1-2．已知,试比较与的大小。变式1-2．比较与的大小,其中且。例1-3．已知,试求的取值范围。变式1-3．设且,,求的取值范围。二、解一元二次不等式例2-1．解下列关于的不等式：(1)；(2)；(3)。2例2-2．解关于的不等式：()。例2-3．解关于的不等式：()。三、线性规划例3-1...
6年级数学同步练习参考答案【篇一：小学六年级数学上册单元练习题集(全册)】t>一、直接写出得数。112112131111＋＝－＝＋＝＋＝―＝―4833510344267二、填空题。1、小力坐在教室的第4列第3行,用（4,3）表示,小星坐在第2列第5行,用（,）来表示,用（6,1）表示的同学坐在第（）列第（）行。2、宋玉和王菲在教室里的位置可以用点（3,6）和点（4,5）表示,（3,6）中的3表示第3列,则6表示（）,（4,7）表示王兵坐在第（）列第（）行。3...
Unit6EnjoyingCyclingTopic2HowaboutexploringTiananmenSquare?SectionD随堂练习一．单项选择。1.Youshould____yourtestpaperscarefullybeforeyouhandthemin.A.checkoutB.lookoutC.thinkoutD.putout【参考答案】A【解析】checkout“检查”。2.—Didyouhavefun____yesterday?—Ofcourse.Wehadagreattime.A.toflyakiteB.offlyingkitesC.flyingkitesD.toflyingakite【参考答案】C【解析】havefundoingsth.“很高兴做某事”。3.Wefo...
Unit6Topic3(考试时间：45分钟,满分：100分)一．根据汉语或首字母提示填空。（每小题2分,满分10分）1.Therearetwenty_________(乘客)inthebus.2.A_________allballgames,Ilikebasketballbest.3.—DoyouhearofLiYang?—Yes.Heisfamousforc_________English.4.Ican’tfindmywatch.Didyouseeit_________(任何地方)?5.TheTourofQinghailakeisthelargestbicycleroadracein_________(亚洲).二．用所给单词的适当形式填空。（每小题2分...
专题08数列（同步练习）B卷二、数列求和(一)公式法：如已知或求出等差和等比数列,则可直接套用其求和公式求和。如出现一些特殊的常用应直接应用公式求和。1、等差数列求和公式：d；nnnanaanaaSmnmnn21)(2211)(1mnd。SSSnmmn2、等比数列求和公式：；1)(11)1(1)(111qqaqaqqaqnaSnnn。mnnnmmmnqSSqSSS3、一些常用的求和公式：21)(21nnnSnn...
Unit6EnjoyingCyclingTopic1Weregoingonathree-dayvisittoMountTaiSectionC随堂练习一．根据句意、首字母或汉语提示,用一个合适的单词填空.1.PeopleinChinarmoneyforthepeopleinWuhan.2.Itisvery(普通的)tosayhellototheteachersinschool.3.Long,longagothereliveda(女王)inoldChina.4.Thedictionarycostmeeight(美元).5.The“serve”meanstogivesfoodordrinksduringthemeal.二．.单项选择1.Theforeignvisitorsarelookingforwar...
专题22解三角形（同步练习）题型一利用正余弦定理求角、边长1-1．（10分）在中,角、、的对边分别为、、,已知。ABCABCabcAbbc2cos(1)若,,求；a26b3c(2)若角,求角。2CB【解析】(1)由余弦定理得,1分bcacbA2cos222∴,即,3分cacbbcacbbbc22222222bcba22代入数值得,解得；5分3c3(26)225c(2) ,∴由正弦定理得,6分Abbc2cosABBCcos2sinsinsin由可得,,∴,2C2AB1s...
Unit7FoodFestivalTopic2ImnotsurewhetherIcancookitwell..SectionD随堂练习一.根据句意及汉语提示拼写单词短语。1.Good____________(饮食习惯)aregoodforourhealth.2.Inthe__________(南部)partofChina,itoftenrainsinsummer.3.Ihelpedhim____________(捡起)hisbooks,andaskedhimwherehelived.4.Isthepicture____________(与不同)thatone?5.Therearetwoormore________(菜肴)foreverymealinEurope.二．单项选择。1.—HowdoesMr....
Unit6EnjoyingCyclingTopic3Bicycleridingisgoodexercise.SectionB随堂练习一．根据句意及所给汉语提示写出所缺单词。1.Thesepolicemenwear_______（头盔）toprotectthem.2.Thegirlalwayslikes________（浅色的）clothes.3.Hemadetoomanymistakes.Hewastoo____________（粗心的）.4.Ifyoubreakthetrafficrules,youwillgeta______（罚款）.5.Ifeveryone________（遵循）thetrafficrules,theroadswillbesafer.二.单项选择。1.—We...
Unit5FeelingExcitedTopic3ManythingscanaffectourfeelingsSectionC随堂练习一.根据句意和首字母或汉语提示补全单词。1.Please_______(充满,装满)theglasswithwater.2.Moreandmorepeoplepayattentiontothe________(环境)problemsallaroundtheworld.3.LifeinBeijingisnoteasy,________(特别,尤其)forthosenewgraduates(大学毕业生）.4.Thereistoomuch______(噪音)inthemarket.Let’sleavehere.5.Ihave________(困难,问题)sleepin...
专题10不等式（同步练习）一、判断两个数的大小和不等式证明例1-1．已知、为正数,且,比较与。abab33ab22abab变式1-1-1．比较与的大小,其中。aa11aa1a变式1-1-2．比较与的大小,其中。43aa54aa5a例1-2．已知,试比较与的大小。a0aa12变式1-2．比较与的大小,其中且。)1log(aa3)1log(aa2a01a例1-3．已知,试求的取值范围。222变式1-3．设且,,求的取值范围。bxaxfx...
Unit7FoodFestivalTopic2ImnotsurewhetherIcancookitwell..SectionA随堂练习一.根据句意及其首字母填空.1.Thatfactoryproduceso_______.【参考答案】oil【解析】oil[ɔɪl]n.油。2.allthenumbersa_______upisfive.【参考答案】add【解析】addup加起来。3.Ieatn______withthefork.【参考答案】noodles【解析】noodle[nu:dl]n.面条。4.Ab_____ofhotchickensoupisgoodforyou.【参考答案】bowl【解析】bowl[bəul]n.碗,盒。5.Ilikee...
Unit5FeelingExcitedTopic1Youlookexcited.SectionD随堂练习一、从方框中选出合适的系动词,并用其适当形式填空。1.—Shallwegoforatriptomorrow?—That_______great.【参考答案】sounds【解析】soundsgreat听起来好棒。2.Whenspringcomes,it______warmerandwarmer.【参考答案】becomes【解析】becomewarmerandwarmer变得越来越暖和。3.John’sfatherissixtyyearsold,buthe______veryyoung.【参考答案】looks【解析】lookyoung看...
Unit7FoodFestivalTopic1Werepreparingforafoodfestival.SectionB随堂练习一．用括号内所给词的适当形式填空1.In__________(west)countries,peopleoftensay“Howdoyoudo?”whentheymeetforthefirsttime.【参考答案】western【解析】western[westə(r)n]adj.西方的,西部的。2.--Doyoulike_______(India)dance?--Yes,Ithinkit’swonderful.【参考答案】Indian【解析】Indian[ˈɪndiən]adj.印度人的；n.印度人。3.______(Russia)...
Unit6EnjoyingCyclingTopic3Bicycleridingisgoodexercise.SectionC随堂练习一．根据句意及所给汉语提示写出所缺单词。1.Everyoneshouldobeythes_____ruleswhiletraveling.【参考答案】safety【解析】safety[ˈseifti]n.安全,平安。2.Youcan’tsmokehere.Don’tyoun_____thesign?【参考答案】notice【解析】notice[nəutɪs]v.看到,注意到n.注意。3.Whenridingatnight,youshouldhavelightsinthefrontandr_______onthebackofyourb...
Unit6EnjoyingCyclingTopic1Weregoingonathree-dayvisittoMountTaiSectionB随堂练习一．根据句意、首字母或汉语提示,用一个合适的单词填空.1.Howmuchdidyou(支付)forthebook?【参考答案】pay【解析】payfor支付.2.Therearemany(旅馆)inourcity.【参考答案】hotel【解析】hotel[həʊtel]n.宾馆,旅馆,饭店.3.Thereisnothinginthe(冰箱).【参考答案】fridge【解析】fridge=refrigerator[fridʒ]n.冰箱.4.Ifeelvery(舒服的)inmyhou...
Unit5FeelingExcitedTopic3ManythingscanaffectourfeelingsSectionC随堂练习一.根据句意和首字母或汉语提示补全单词。1.Please_______(充满,装满)theglasswithwater.【参考答案】fill【解析】fillwithsth.（使）充满,填满,装满.2.Moreandmorepeoplepayattentiontothe________(环境)problemsallaroundtheworld.【参考答案】environment【解析】environmentproblems环境问题.3.LifeinBeijingisnoteasy,________(特别,尤其)forthos...
Unit5FeelingExcitedTopic1Youlookexcited.SectionA随堂练习一、根据句意及汉语提示补全单词。1.—Don’tthrowlitterabout.Thelittersmells(发气味)terribleinsummer.—Sorry,Iwon’t.2.Janelooks(看起来)happy.There’sabigsmileonherface.3.KungFuPandaisoneofmyfavoritefilms(电影；影片).4.—Iwanttoinvite(邀请)youtomybirthdayparty.—Thankyou.二、单项选择。看谁选得又准又快。1.—Longtimenosee,Joyce.____—Everythin...
人教版高一化学必修2同步稳固练习解析：2-2-2发展中的化学电源一、选择题1．下列化学电池不易造成环境污染的是()A．氢氧燃料电池B．锌锰电池C．镍镉电池D．铅蓄电池【参考答案】A2．随着人们生活质量的不断提高,废电池必须进行集中处理的问题被提到议事日程,其首要原因是()A．利用电池外壳的金属材料B．防止电池中汞、镉和铅等重金属离子对土壤和水源的污染C．防止电池中渗漏的电解液腐蚀其他物品D．回收其中的石墨电极【参考答...
Unit6EnjoyingCyclingTopic3Bicycleridingisgoodexercise.SectionB随堂练习一．根据句意及所给汉语提示写出所缺单词。1.Thesepolicemenwear_______（头盔）toprotectthem.【参考答案】helmets【解析】helmet[helmɪt]n.头盔。2.Thegirlalwayslikes________（浅色的）clothes.【参考答案】light-colored【解析】light-colored[laɪtkʌləd]adj.浅色的,淡色的。3.Hemadetoomanymistakes.Hewastoo____________（粗心的）.【参考答...
