江西省瑞昌市2023-2024学年度上学期七年级期中考试试卷数学.考卷答案试卷答案,我们目前收集并整理关于江西省瑞昌市2023-2024学年度上学期七年级期中考试试卷数学.考卷答案得系列试题及其答案，更多试题答案请关注微信公众号：考不凡/直接访问www.kaobufan.com(考不凡)
江西省瑞昌市2023-2024学年度上学期七年级期中考试试卷数学.考卷答案试卷答案
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W:Thatwillbeeasy.IfIteachyouhowtocook,youwillprefermakingyourownfoodsoon.Text4W:Ican'tbelievethishappenedtomerightbeforemypaperisdue.M:What'swrong?Didyouforgettosavethefile?W:No.Mykeyboardstoppedworking!Istillhavehalfofmypapertofinish!Text5W:I'dliketopaymybillnow.M:Yournameandmomnumberplease?W:SusanBanks,andmyroomnumberis508.Text6M:Well,thismakesachange.Whereiseverybody?W:UsuallywhenItakethisflight,itishardtogettomyseat.M:Whathappenedtoallthepassengers?W:Maybeit'semptybecauseoftheholiday.Whowantstogetupat6:00a.m.duringaholiday?M:Wedid.Andsodidthebusdriverwhobroughtustotheairport.W:Weshouldn'tcomplain.Let'sjustenjoyhavingsomeextraroomforachange.Text7W:Whenareyouleavingforyourfamilyvacation?Ineedtofigureouthowtoscheduletheholidayhourssoon.ItneedstobepostedbeforeFriday.M:I'mleavingonthe17th.I'llbebackatworkonthe26th.Feelfreetoschedulemeonthatday.Iknowthatthistimeofyearcanbequitecrazy.W:Okay,thanks.IwillaskJohnifhecanwork,andthenIwillposttheschedule.LasttimeIchecked,wewillhaveenoughpeopleworkingonthe26th,though.Youcanbeginworkagainthedayafter.M:Thanks.Iwilltaketheextradaytorecoverfromtraveling,then.Text8M:Whatpercentageoftheworld'spopulationdoyouthinkcanspeakmorethanonelanguage?W:Idon'tknow.Maybehalf?M:Almost.Around40%onlyspeaksonelanguage.W:Andtherestcanspeaktwo?M:Actually,43%canspeaktwolanguages,Therestcanspeakthreeormore.W:IwishIcouldspeaklotsoflanguages.ThatwayIcouldtravelaroundtheworldandspeaktopeopleindifferentcountries.M:You'dbettergetstudying,then.Ittookmeyearstolearnotherlanguages.W:Whatotherlanguagescanyouspeak?M:FrenchandItalian.ButIlivedinthosecountries,soitwasaloteasierformetopickthemup.IcanspeakEnglish,butIneverlivedinEngland.Ilearnedthatatschool.I'dlovetolivethere,thoughifonlyforalittlewhile.Text9W:IsittruethattheTokyo2020Olympicshavebeenputofftillnextyear?
26.滑动摩擦力f的大小是由物体接触面间的压力FN动摩擦因数和接触面的粗糙程度决定的。物理学中用表示接触面的粗糙程度,则有关系式f=FN小左拉的作甲下,沿水平面向右做匀速直线运动。已知成立。如图所示,一个木块放在F=5N,木块重为,40N,块运动过程中:,木块的运动速度为0.5m/s,若图中木块与地面间的动摩擦因数=0.3,,求木(1)木块受到滑动摩擦力f的大小;(2)拉力F的功率;(3)该滑轮组的机械效率。
