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如图23-7-12，菱形ABCD的边长为1，直线l过点C，交AB的延长线于M，交AD的延长线于N，则+= ．图23-7-12
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如图在四棱锥O.一ABCD底面ABCD是边长为1的菱形∠ABC=OA上底面ABCDOA=2M.为OA
如图菱形ABCD的边长为2∠ABC＝45°则点D.的坐标为______.
如图菱形ABCD中1若半径为1的⊙O.经过点A.B.D.且∠A.＝60°求此时菱形的边长2若点P.为
如图直线L过正方形ABCD的顶点B点A点C到直线L的距离分别是2和1求正方形ABCD的边长
半径为2cm的与⊙O边长为2cm的正方形ABCD在水平直线l的同侧⊙O与l相切于点FDC在l上.1过
如图1菱形ABCD的顶点AD在直线l上∠BAD＝60°以点A为旋转中心将菱形ABCD顺时针旋转α0°
如图点O.为平面直角坐标系的原点边长为4的菱形OABC的一边OA与x轴的正半轴重合点B.和点C.都在
如图菱形ABCD的对角线ACBD相交于点O过点D.作DE∥AC且AC=2DE连接AE交OD于点F.连
如图在四棱锥O.－ABCD中底面ABCD是边长为l的菱形∠ABC＝OA⊥底面ABCDOA＝2M.为O
如图在四棱锥O.-ABCD中底面ABCD是边长为1的菱形∠ABC＝OA⊥底面ABCDOA=2M为OA
如图直线l过正方形ABCD的顶点B.点A.C.到直线l的距离分别是1和2则正方形的边长是____.
已知四边形ABCD是边长为2的菱形∠BAD=60°对角线AC与BD交于点O.过点O.的直线EF交AD
如图已知菱形ABCD的边长为5对角线ACBD相交于点O.BD=6则菱形ABCD的面积为.
如图在菱形ABCD和菱形CEFG中BCE三点在一条直线上CDG三点在一条直线上若菱形ABCD边长为3
已知四边形ABCD是边长为2的菱形∠BAD=60°对角线AC与BD交于点O.过点O.的直线EF交AD
如图菱形ABCD的边长为1直线l过点C交AB的延长线于M交AD的延长线于N求的值．
如图将菱形纸片ABCD折叠使点A.恰好落在菱形的对称中心O.处折痕为EF若菱形ABCD的边长为2cm
如图直线L过正方形ABCD的顶点B点A点C到直线L的距离分别是2和1求正方形ABCD的边长
如图菱形ABCD的边长为1直线l过点C.交AB的延长线于M.交AD的延长线于N.则=.
如图在边长为2的菱形ABCD中∠A.=60°点M.是AD边的中点连接MC将菱形ABCD翻折使点A.落
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1分﹣WhendidtheGreenscometoChina? ﹣TheyChinaforsevenyears. A.havecometo B.havebeento C.havecomein D.havebeenin
8分AsAmyHagadornroundedthecorneracrossthehallfromherclassroomshemetwithatallboyfromthefifthgraderunningintheoppositedirection. Watchitdwarf矮子theboyshoutedashekeptawayfromthelittlethirdgrader.Thentheboyimitated模仿thewayAmylimped跛行whenshewalked. Amyclosedhereyesforamoment. Ignore忽视him!shetoldherselfassheheadedforherclassroom. Itwasn'tasifheweretheonlyone.ItseemedthateversinceAmystartedthethirdgradesomeoneteasedhereverysingleday.TheteasingmadeAmyfeellonely. BackhomeatthedinnertablethateveningAmywasquiet.Hermotherknewthatthingswerenotgoingwellatschool.That'swhyshewashappytohavesomeexcitingnewstosharewithherdaughter. There'saChristmasWishCompetitiononthenewspapershesaid.WritealettertoSantaClausandyoumightwinaprize. OutcamethepencilandpaperandAmywenttoworkonherletter.Shewrote: DearSantaClaus MynameisAmy.Iam9yearsold.Ihaveaproblematschool.CanyouhelpmeSanta?KidslaughatmebecauseoftheuayItalkandrunandtalk.Ihavecerebralpalsy大脑性瘫痪.Ijustwantonedaywherenoonelaughsatme. Love Amy ThenextdayapictureofAmyandherlettertoSantaClausmadethefrontpageoftheNewsSentinel.Thelittlegirl'sstoryspread.SheaskedforsuchasimpleyetunusualChristmasgift﹣justonedaywithouttenning. ManypeoplethankedAmyforbeingtbraveenoughtospeakup.Othersencouragedhertoignoreteamingandtoearryherheadhigh. Amydidgetherwishofaspecialdnywithouttenning.Tenchernandstudentstalledtogetherabouthowbadtensingcanmakeothersfeel. 1.Theunderlinedwordteasedmeans. A.arguedwith B.talkedabout C.caredfor D.madefunof 2.Amy'smothersharedthenewsofaChristmasWishCompetitionthatdaybecausesheknew. A.Amy'sschoollifewasnotgood B.herdaughterwasteasedbyafifthgrader C.thecompetitionwouldchangeAmy'slife D.Amy'ssicknesswentmuchworsethanbefore 3.Wecaninfer推断fromtheunderlinedsentenceBackhomeatthedinnertablethatevening.AmywasquietthatAmywas.A.nervousB.sadC.happyD.moved
8分Manyofusdon'tpaymuchattentiontotheimportanceofeyecare.Itissaidthatifyoutakecareofyourbodythenyoucansurelybehealthy.Thatiswhyoureyesshouldbegivenalotofcare.Naturaleyecareshouldbeputinanumberoneplace. Thereareseveralcausesleadingtopooreyesightlikenotenoughfoodgenes基因andaging老化.Televisionscomputersandreadingarealsothecausesofhavingpooreyesight.Ifyouworkinfrontofthecomputeritisbesttotakeabreakeveryonceinawhile.Somethingdirtycancauserednessandtheywillmakeyoufeeluncomfortable.Itisbadforyoureyestoo.Ifthishappensthebestwayistocleanyoureyesbyusingcoldwater. Alsoit'simportantthatyoumusttryyourbesttoprotectyoureyesfromharmfulthings.Forexamplesunglassesarenotjustforfashionbuttheycanalsoserveasagreatwaytoprotectyoureyesightfromultravioletrays紫外线. Eatinghealthyfoodswilldogoodtoyoureyesight.RememberthatvitaminsACandEaregoodforeyes.Trytoeatfoodgroupsthathavethesevitamins.Andyoushoulddoeyeexercisesbecauseexerciseprotectsyoureyesighttoo.Ifapersonexercisesregularly定期地andeatstherightkindoffoodhiseyeswillstayingoodconditionforalongtime. Allabovearenaturalwaysofeyecarethathelpuskeephealthyeyes.Beinghappyallthetimecanbehelpfultoaperson'seyesighttoo.Inawordeyecareisveryimportantnomatterhowoldapersonis. 1.Allthefollowingcausescanleadtobadeyesightexcept. A.age B.height C.reading D.computers 2.Whatshouldyoudoifyouhavetoworkinfrontofthecomputer? A.Eathealthyfoods. B.Cleantheeyesbyusingcoldwater. C.Wearapairofsunglasses. D.Havearestafterworkingforawhile. 3.Ifweputthepassageintothreepartswhichofthefollowingisthebest? ①＝Para.1②＝Para.2③＝Para.3④＝Para.4⑤＝Para.5 A.①;②;③④⑤ B.①②;③④;⑤ C.①;②③;④⑤ D.①;②③④;⑤ 4.Whichisthebesttitleofthepassage? A.WaysofEyeCare B.WaysofEyeExercises C.WaysofBeingHappy D.WaysofBeingHealthy
1分根据句意用括号内所给词的适当形式填空. Tomysurpriseourteammatesall点头inagreementJustnow.
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