[今日更新]2024届高三年级1月大联考（河北卷）.物理试卷答案

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[今日更新]2024届高三年级1月大联考（河北卷）.物理试卷答案试卷答案

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9.Whatdoestheunderlinedword"lucrative"inparagraph4probablymean?A.deliciousB.affordableC.profitableD.nutritious10.What'sthemainproblemofcamelmilkinAfrica?-A.LowqualityC.AlackofmarketdemandB.HighpricesD.Alackofmarketingchannels11.WhataiddoesShariftaketothefutureofcamelmilk?A.Hehashisdoubts.C.Heshowshisexcitement.B.Hehasconfidenceinit.D.Heexpresseshisconcerns.Donwostraweriesideiceecmeoutofasupermarketbaningitaspobablyharvestedhenasotripe,immediatelyplacedinforairoeduckvofBythetimeitreachedthepateitmayhavebeepickedfortweeksTheerrywaspickedfromagardenminutesbeforebeingeaten.Thefirstonewillprobablytastelikeaslightlymushy(揿踏踏的)cucumberwithstrongsourflavors.Thesecondislikelytobesweet;theflavourwilllingerinthemouth,asthescentwillonthehands.Supermarketstrawberriesarenotentirelywithoutadvantages:theyareconvenientandavailableinthenorthernhemisphere()inFebruary.ButthetwoberriesdifferfromeachotherinthesamewaythathearingBach'sMassinBMinorinaconcerthalldiffersfromlisteningtoitonacassette()Thehome-grownfruitisaneatablecaseforcultivatingahomegarden.Somepeoplealwaysarguegardeningisawasteoftime.Plantingcool-weathergreens,asgardenersrsthenorth-eastofAmericaaenowdoing,csemmakeses.ConvenientolckesupermarkethevelablellweknmayplacessupplementedweekendsbyfamersmarketsButhesameousaidofcooking:cheapandgoodrestauratsaround,sowhybothertomakeyourownmeals?hatmisnersandsthemheproductorthepurpose.Itistruethatagardencanyieldpeasthattastelikethevibrant(生机勃勃的)，greenspring:ondfncmnhshtkthmeahththeasihyelpckhichneoherand.agarden,especiallythearlyyears,sietfrusrtipantthewrongcropsfortheirsoil.Squirrelshaveahabitofkmsbeansadomates,thenleavingherettootAndevenseason'sharvestbecauseofbadweather.Nomatter.TherealjoyofgardeningisthetimespentdoingitTheeepespeasrasithcookingtngbringnguplrenoralmostanythingwhilsnhekAardenermmreoaroundthefoodobutwithhandsinthedir,suroundedbyfamilyifthegardenishomehfriendsandneighboursinacommunitygarden.Togardenistoatentligeorish.inthegroundandaboveit.

15.(10分)如图11所示,三根细轻绳系于O点,其中OA绳另一端固定于A点。OB绳的另一端与放在水平桌面上质量为10kg的物体乙相连,OC绳的另一端悬挂质量为2kg的钩码甲。平衡时轻绳OA与竖直方向的夹角=37^,OB绳水平。已知重力加速度g=10m/s^2,37^=0.6,37^=0.8。(1)求平衡时轻绳OA、OB受到的拉力大小;(2)已知乙物体与水平桌面间的动摩擦因数1=0.3,,且最大静摩擦力等于滑动摩擦力,若在钩码下方继续加挂钩码,要使物体乙仍保持静止且结点0位置不变,求最多能挂的钩码总质量。AC图11

13.(11分)一质量为m、电荷量为q(q>0)的粒子以速度垂直y轴进入第一象限,后垂直x轴射出,粒子只受洛伦兹力作用,磁感应强度大小为B,方向垂直纸面向外,磁场区域是等腰梯形,求:(1)粒子在磁场中运动的时间t;(2)等腰梯形面积的最小值S。

(3)经测量滑块A、B上的遮光条宽度相同,则验证动量守恒的表达式为(用m1、m2、t1、t2、t3表示).