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M:Nutsandgreensaresomethingwealreadyeatplentyof.Andalthoughourtypeofrice-thewhitekind-isn'tonthelist,brownriceis.W:ThenIthinkwewillswitchtothattokeepthefamilyhealthy.Superfoodssoundlikeaverytastywaytokeepfit.(Text9)W:What'stheproblem?M:I'vebeengettingapaininmyforeheadrecently.W:Haveyouhadanycoldsorflurecently?M:Ihadacoldacoupleofweeksago,butthat'sgone.W:Areyoustudyingalot?Areyougettingenoughsleep?M:Yes.I'mstudyingquitealot,butI'mmakingsuretosleepplenty.Iusuallygotobedaround11,andIamupatabouteight,soIhavetimetogorunningforhalfanhourbeforegoingtotheuniversityatnine.W:Quitehealthy.Hasthispainkeptyouawake?M:Yes,itmakesgettingtosleepharder.It'smuchworseattheendoftheday.Ihardlyno-ticeitinthemorningorintheafternoon.W:Areyoueatingproperly?M:Ithinkso.Mymothercooksmymeals.W:Youdon'twearglasses,right?Whendidyoulasthaveyoureyesexamined?M:WhenIwasachild.W:Thatmaybetheproblem.Ithinkyoushouldgetthatdoneagain.Inthemeantime,takethispillwhenyou'reinpain,andcometoseemeagaininaweek.M:OK.Thankyou.(Text10)M:Sellingyourthingsonlinehelpsyougetridofthoseyoudon'tneed,anditcanalsobeagreatsourceofincome.Onethingyouneedtoconsidercarefullyistheplatformonwhichyouaregoingtoadver-tise.Mostbigplatformsinthefieldaresopopularwithsellers,notjustbecausetheycangiveyouaccesstoabiggerpoolofpotentialcustomers,butalsobecausetheyofferinsurance.Thedisadvantage,however,isthatyouwillneedtopaysomemoneyforusingtheplat-form.Youcanusesomeplatformsthateitherchargeasmallerfeeforadvertisingorevennofeeatall-but,inthatcase,whatyouwillneedtokeepinmindisyoursafety.It'salwaysbesttomeetthebuyerduringthedayatapublicplacesuchasacoffeeshop,alibrary,orasupermarketparkinglot-anywheremonitoredbysecuritycamerasisgood.Afewmorethingstokeepinmind:alwaysbeaccuratewithyourdescriptionsofthethingsyouareselling.Thelastthingyouwantistobeaccusedofcheatingandbannedfromthewebsite.Moreover,becarefulwithyourpersonalinformation.在114：【23·G3DY(新教材老高考)·英语·参考答案一R一必考一N】
15.(16分)如图所示,某粮食仓库用传送带运送粮食,传送带与水平面的夹角=37^,,高为10m,传送带在电动机的带动下,始终保持2的速度顺时针转动。现把一袋90kg的粮食(可视为质点)轻放在传送带的底端,经过一段时间粮袋与传送带达到共同速度,之后继续向上运动到传送带最高点。已知粮袋与传送带间的动摩擦因数=0.8,,取重力加速度大小为g=10m/s^2,37^=0.6,37^=0.8,,则在此过程中,(1)求粮袋加速运动时的加速度大小;(2)求粮袋加速运动过程中相对传送带的位移大小;(3)若粮袋在传送带上运动9s时传送带突然停止运行,试判断粮袋能不能到达传送带的最高处,若未到达,求离最高点距离(结果保留两位有效数字)。
9.充电宝内部主要部件是锂电池,充电宝铭牌上标注了锂电池的电压和容量,民航局规定严禁乘客携带超过160W⋅h的锂电池上飞机(如图).则电压为3.7V,容量为下列哪个数值的充电宝不可以带上飞机()A.10000mA·hB.40000mA⋅hC.50A·hD.30A⋅h
(1)A组同学在实验中,保持小车的质量M不变,仅改变砝码盘中砝码的质量m,得到多组加速度大小a和对应力传感器的示数F,作出a-F图像如图乙所示,图像未过原点的原因是。
