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如图所示这是小梦同学探究凸透镜成像规律的实验装置图． 1实验前小梦需要点燃蜡烛并调整凸透镜与光屏的高度使蜡烛火焰与凸透镜的中心光屏的中心大致在 2张老师告诉他凸透镜的焦距是10cm 移动光屏结果在凸透镜右侧大约63cm刻度线处获得了清晰的像人们运用这条成像规律制造出了选填“照相机”“投影仪”或“放大镜” 3张老师取下自己戴的眼镜放于蜡烛和凸透镜之间光屏上的像又变得模糊小梦发现当光屏向左移动适当距离后像又清晰．由此可知张老师所戴的眼镜是张老师的眼镜属于选填“近视眼”或“远视眼” 4向右移动蜡烛到一定的位置时无论怎样移动光屏都无法在光屏上承接到像可能的原因是
﹣Wouldyoulikesomejuiceorcoffee? ﹣isOK.Ireallydon'tcare. A.Both B.Either C.All D.Neither
小李同学想测量一块玻璃碎片的密度． 1用调节好的天平测量碎片的质量所用砝码的个数和游码的位置如图甲所示则碎片的质量为g 2他发现碎片放不进量筒改用如图乙所示的方法测碎片的体积 ①往烧杯中加入适量的水把碎片浸没在水面到达的位置做标记然后取出碎片 ②先往量筒装入40ml的水然后将量筒的水缓慢倒入烧杯中让水面到达标记处量筒里剩余水的体积如图丙所示则碎片的体积为cm3． 3用密度公式计算出碎片的密度ρ＝kg/m3． 4该实验所测密度与碎片实际的密度相比较填“偏大”或“偏小”
Himom.Ihavetotellyou. A.anythinggood B.goodsomething C.somethinggood
如图所示在某房间的天花板上装有平面镜MS为一灯泡P为不透明的墙．请画出灯泡发出的光经平面镜反射后能够照亮P墙右侧区域的光路图．
假如你是Martin你的笔友Alice在给你的来信中说她经常生病情绪低落.请你给她写封回信告诉她应该怎样做. 参考词汇healthyfooddomoreexerciseenoughsleepkeephappytalkaboutyourproblems. 要求1.根据参考词汇并适当发挥 2.字数不少于60词注意字迹工整. DearAlice I'msorrytohearthatyouarenotverywellandfeelunhappy.Icangiveyousomeadvice. .
﹣﹣Whatdidhedothedaybeforeyesterday? ﹣﹣HeagameshowonTVathome. A.iswatching B.watch C.watches D.watched
﹣﹣Whatshouldnext? ﹣﹣Puttheturkeyinahotovenandcookitfortwohours. A.another B.more C.other D.others
﹣Ineedsomehelp.Canyouthebananasforfruitsalad? ﹣YesMum.Butwhere'stheknife? A.cutup B.mixup C.putup
HaveyourparentsbeentotheBird'sNestbefore?作出否定回答 No.
ITVlastnightwhenIheardknocksatthedoor. A.watch B.waswatching C.watched
TinaisoutgoingthanTara. A.much B.muchmore C.alittle
Ivisitedthezooyesterday.用atthistimeyesterday改写句子 Ithezooatthistimeyesterday.
MysisterhaslearntEnglish. A.fortenyearsago B.sinceshewasfour C.tenyearsago
﹣﹣Ifeelterribledoctor.What'sthematterwithme? ﹣﹣I'mafraidyouhavean.Takethismedicineandhaveagoodrest. A.shape B.temperature. C.calendar D.tradition
volunteer raise setup putoff fixup puton 1Wearemakingplanstomoneyforhomelesspeople. 2Canyouhelpmemybrokenbike? 3Nevertilltomorrowwhatyoucandotoday. 4Whydotheytohelpothers? 5ThestudentsaregoingtoanewplayonSchoolDay.
Taobao.comisoneofshoppingwebsitesinChina. A.large B.larger C.thelargest
meet busy take useful need must 1Thesesockslooknice.I'lltwopairs. 2Let'sat800am. 3ThesedaysIamwithmymother'sbirthdayparty. 4TheteachersaysitisbutIthinkitisdifficult. 5Iasweaterforschool.
Thechildrenwillclimbthehillifittomorrow. A.won'train B.didn'train C.isn'training D.doesn'train
﹣﹣HowmuchshouldIpayforthemeal? ﹣﹣Thirtydollarswillallyouwanttohave. A.use B.spend C.cost D.cover
﹣﹣Beninvitesmetodinner.WhatshouldIwear? ﹣﹣Youdonotneedto_______fordinner.Wearjustasusual. A.dressup B.putup C.giveup D.takeup
如图所示某同学家今年的两次抄表情况他们这一个月用电kW•h．他们家新购进一套用电设备为测试该设备电功率大小仅让该用电器工作10min表盘转过100r此用电设备的功率大约为W．
﹣﹣Whenwillyoufinishthisjob? ﹣﹣. A.Forfiveyears B.Afterfiveyears C.Infiveyears D.Fiveyearsago
﹣﹣Don'trideyoure﹣bikeonthemotorway机动车道.It'sdangerous. ﹣﹣. A.YesIwill B.SorryIwon't C.ThanksIwill D.NoIdon't
Themovietheateristhebestplaceonweekends. A.togo B.goingto C.togoto
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