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富平县2023-2024学年度八年级第二学期期末教学检测物理试卷答案试卷答案
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天一大联考2022一2023学年高三年级上学期期中考试英语·答案听力原文Text1W:Hi,Mark.Howiseverything?M:I'mabitbusyrightnow.We'vegotguestscomingfortheweekendandthehouseissountidy.Maggie,youknow,Ihatehousework.Text2W:Itlooksasifit'sgoingtorain.You'dbetterlookforyourumbrella.M:Yeah,Ithinkit'sdefinitelygoingtorain.That'swhyI'mnotgoingout.Text3W:Thismachinehassomanybuttons.Ican'tfigureoutwhichonemakesit.M:Well,you'dbetterreadtheinstructionsfirst.Pressingthebuttonsimproperlymaycausethemachinetobreakdown.W:Oh,Isee.Text4M:What'sthebestwaytodowntown?W:Ifyou'reinahurry,youshouldtakeataxi.M:I'minnoparticularhurry.W:Well,inthatcase,takeanairportbusthen.M:Thatcannotbeabetteridea.Text5W:Jack,haveyougotthebookIaskedyoutoborrowtheotherday?M:Sorry,Ihaven't.Icouldn'tfindtimetogotothelibrary.Text6M:Hi,Rose.You'vebeenlookingforhousesformonths.Can'tyoufindone?W:Well,Ishouldbecarefulaboutchoosingone.It'sabigsteptobuyahouse.I'drathertakemytimenowthanbesorrylater.TIANYICULTUR目M:That'sright.Therearealotofhousesforsaleneartheuniversity.W:I'vebeenthere,verybeautifulhouses,butIpreferoldbutbighouses.Weneedlotsofrooms,youknow.AndIthinkIhadbetterbuyanoldhouse.M:However,acheaphousemeansfewmodernconveniences.Whynotgetanewone?W:Jeffcandecoratetheoldone.Youknow,he'ssoskillful.Someofthenewhousesnowhaveverysmallrooms.Idon'twanttospendtherestofmylifeinthem.M:Aren'tyoutiredofkeepingsomanyroomscleaneveryday?W:Notatall.Cleaningisapleasureforme.Oh,herecomesmybus.Bye!Text7M:Nowwehavefive-dayclasseseveryweek,sowehavemoresparetimethanbefore.一1
富平县2023-2024学年度八年级第二学期期末教学检测物理试卷答案第一部分
3.光导纤维是传光的细圆玻璃丝,每根纤维分内外两层.一束光由光纤端面从空气射向内层材料,经内、外层材料的分界面发生多次全反射后呈锯齿形的路线可以无损地传到另一端,如图为一根光纤的截面图,左端面与两种材料的界面垂直,当光从端面的圆心人射后,在从光纤的端传到另一端的过程中光线不从内壁漏掉时,人射角的最大值为1.已知内层和外层材料的折射率分别为n1和n2(n1>n2),,光在真空(空气)中的传播速度为则sinθ;的值为2)A.n1^2-n2^2B.n1-n2C.n2^2-n1^2D.n2-n1
富平县2023-2024学年度八年级第二学期期末教学检测物理试卷答案第二部分（待更新）
(3)小钢珠在液体中最后做匀速运动,则在室温下(大约25^C)该液体的黏滞系数7为(保留两位有效数字)(小钢珠的密度ρ=7.8×10^3kg/m^3,液体密度0=1.010^3kg/m^3,小钢珠的直径d=1mm,,重力加速度g=10m/s^2)
