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教案备课库《2018——2019学年（九）年级上学期（数学）学科国庆作业（二）》真题及答案
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下列各组线段的长度成比例的是
如图在△ABC中∠C=90°AC=6cmBC=8cm点D从点C出发以2cm/s的速度沿折线C-A-B向点B运动同时点E从点B出发以1cm/s的速度沿BC边向点C运动设点E运动的时间ts0＜t＜8．1求AB的长．2当△BDE是直角三角形时求t的值3设△CDE的面积为ycm2求y与t的函数关系式
Wehavegotenoughtimetopackourclothes.Thereisnoneedto.A.laugh B.help C.rush D.notice
Theoldmanhasbeenforthreeyears. A.died B.death C.die D.dead
Heoftenmakesspeechinpublic.
Hewoninthestorycompetitionandhisparentswerevery.A.smart B. proud C. sorry D. upset
绿苑小区在规划设计时准备在两幢楼房之间设置一块面积为200平方米的矩形绿地并且长比宽多10米求绿地的长为多少米
若一元二次方程ax2-bx-2016=0有一根为x=-3则3a+b=．
TwoplacesofinterestinBeijingarewell-knowntopeoplefromhomeandabroad.OneistheGreatWall istheSummerPalace.A. theother B. another C. other D. theothers
Theyoungmanboughtabighousewithabeautifulforheknowshisparentsloveflowersandplants.
—MissZhouisverypopularwiththestudents.—Yes.Herclassesarealwaysandinteresting.A.boring B.lively C.difficult D.lazy
Ifyoudon'tknowthemeaningofthewordjustlookitinthedictionary. A.after B.through C.for D.up
It'stostandupwhiletalkingwithourteachersorparents.
Ginausedtoonweekendsbutnowshe'susedtotoafter-schoolclasses. A.watchTV;going B.watchingTV;going C.watchTV;go D.watchingTV;go
Thereusedtoatalltreeinfrontoftheoldhouse. A.have B.be C.had D.was
Everyoneshouldbetreatedfairlymakesmistakes. A.whenever B.wherever C.whoever D.whatever
某大型超市连锁集团一月份销售额为500万元三月份达到了720万元若二三月份两个月平均每月增长率为x根据题意列出的方程为．
如图AB∥CD∥EFAF与BE相交于点G且AG=2GD=1DF=5那么的值等于A． B． C． D．
比较大小用“＞”或“＜”填空
Mylittlesistertheroombecauseit'stoodarkoutside.A.darenotleave B.dareleave C.daretoleave D.darenottoleave
Nomatterheisalwayswithhisfamilyatweekends.A.howbusyheis B.howbusyisheC.howishebusy D.howheisbusy
—IthinkSing!Chinaisthehottestshowthisyear. —Peopleofallageslikeit. A.Howcome? B.Withoutdoubtitis. C.It'shardtosay. D.Ican'tbelieveit.
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Helendoesthingssocarefullythatshemakesmanymistakeslikeothers.
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