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[今日更新]山西省八年级2023-2024学年新课标闯关卷（四）SHX.物理试卷答案

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whattoexpectbeforetheytravel.That'swhythebesttraveliswhenit'sforthefirsttime.ImagineapersonwhohasalwayswantedtotraveltotheUnitedStates.Ofcourse,they'veprobablyseentheStatueofLibertyathousandtimesonTV,andtheWhiteHouse,andalltheotherfamoussights.Butnoneofthatwouldcomparetotheexcitementoflookingoutofthewindowastheplanelands,watchingthecitiesandstreetsoftherealAmericacomeintoview.Althoughtravelisoftenjustforrecreation,it'salsoeducational.Wemaynotknowthatwearegettinganeducation,butwestillare.We'relearningeveryday:newwordsinanewlanguage,newpeople,andnewwaysoflife.Butthislearningtakesplaceintheschooloftheworld,nottheclassroom.Aswegettoknowforeignplaces,wecometounderstandthattherearemanydifferentwaystolive,andthatthewayweliveisn'tnecessarilythebestway.28.TheauthorusesMarcoPoloandZhangQianasexamplesto_A.explainhowtheSilkRoadwasfounded.B.presenttravelasanamazingexperienceC.showZhangQianandMarcoPoloaregreat.D.describeimportantculturalexchangesinhistory.29.Bysaying"thebesttraveliswhenit'sforthefirsttime",theauthormeans_A.one'sfirsttripisusuallythemostchallenging.B.noothertripisbetterthanone'sfirsttrip.C.thereisalwaysmuchtolearnonone'sfirsttrip.D.peopleusuallymakebetterpreparationsfortheirfirsttrip30.Theunderlinedword"recreation"inParagraph4probablymeans.A.fun.B.sight.C.learning.D.knowledge.31.Accordingtothelasttwoparagraphs,theauthorbelievesthatA.travelingshouldbeincludedinformaleducation.B.travelingimprovespeople'sconfidenceintheirlifestyle.C.foreignjourneyscanenrichpeople'sknowledgeoftheworld.D.foreignwaysoflifearebetterthanourownwayoflifeathome0Angerisgoodforyou,aslongasyoucontrolit,accordingtonewpsychologyresearch.AnewstudyfromCarnegieMellonUniversityshowsangermayhelppeoplereducethenegativeeffectsofstressandhelpyoubecomehealthier."Heregettingemotionalisnotbadforyouifyoulookatthecaseofanger,"saidJenniferLernerofCarnegieMellon."Themorepeopleshowanger,thelowertheirstressresponses."Lernerstudied92UCLAstudentsbyaskingthemtocountbackfrom6,200.Theymustsayoutloudeverythirteenthnumber.Researchersdisturbedthembyaskingthemtocountfasteroraskthemotherquestions.Iftheymadeanymistakes,theyhadtorestartfromtheverybeginning.Manystudentsfeltupsetaboutmakingsomanymistakesorgotangry.Lernerusedahiddenvideocameraandrecordedalltheirfacialexpressionsduringthetest.Theresearchersdescribetheirreactionsasfear,anger.Otherresearchersrecordedthestudents'bloodpressure,pulseandproductionofahigh-stresshormone()calledcortisol.Peoplewhosefacesshowedmorefearduringtheexperimenthadhigherbloodpressureandhigherlevelsofthehormone.Bothcanhavelastingeffectssuchasdiabetes(),

9.跳台滑雪是勇敢者的游戏。如图所示,一质量为m的运动员(可视为质点)由静止从轨道的O点滑下,然后从倾角为θ、足够长斜面的顶端A点以速度v0斜向上飞出飞出方向与斜面的夹角为20,运动员最终落到斜面上的B点。已知重力加速度为。不计空气阻力,则下列说法正确的是A.A、B两点间的距离为4v0^2gB.运动员从A点运动到B点所用的时间为4v0gC.从A点运动到B点,运动员动能的增加量为4mv0^2^2D.从A点运动到B点,运动员动量的增加量为4mv0

(填写器材前面的字母).实验要求字母).实验要求测量尽可能准确,请你在答题卡在答题卡中画出学成的实验电路图(如图乙所示),并在图中标上相应的电学符号,待测电阻用R.表示Rx示(3)该学习小组改变食盐浓度w(溶质质量占全部溶液质量的百分比)后,测得了不同

[今日更新]山西省八年级2023-2024学年新课标闯关卷（四）SHX.物理