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发表于:2019-03-28
问题详情:如图所示为点电荷Q的电场中的三条电场线,下列说法正确的是( )A.若Q为负电荷,EA<EBB.若Q为负电荷,EA>EBC.若Q为正电荷,EA<EBD.若Q为正电荷,EA>EB【回答】BD【详解】由于不知道电场线的方向,...
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发表于:2021-10-24
问题详情:如图所示,电场中有A、B两点,则下列说法中正确的是()A.电势φA>φB,场强EA<EBB.电势φA<φB,场强EA>EBC.将+q从A点移动到B点,静电力做正功D.将﹣q分别放在A、B两点时具有的电势能EpA>EpB【回答】...
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发表于:2020-07-11
问题详情:如图所示,电场中有A、B两点,则下列说法正确的是()A.电势φA>φB,场强EA<EBB.电势φA<φB,场强EA>EBC.将+q电荷从A点移到B点电场力做负功D.将-q电荷分别放在A、B两点时具有的电势能EpA<Ep...
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发表于:2021-08-22
问题详情:如图所示的电场中有A、B两点,下列判断正确的是()A.电势φA>φB,场强EA>EBB.电势φA>φB,场强EA<EBC.将电荷量为q的正电荷从A点移到B点,电场力做正功,电势能减少D.将电荷量为q的负电荷分...
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发表于:2019-01-18
Thedryfootprintsattheebbofthetidemaybemarkedwithsunshineorhaze.ItwasclearthattheVarnumfortuneswereattheebb,butthetwowomendidwhattheycouldtopreserveadecentdignity.Analyses...
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发表于:2024-01-11
1、TheoceansebbandflowforYou.2、Theebbandflowofyourlifemirrorstheebbandflowofalllife.3、Lifeisebbandflow,giveandreceive.4、Shewassufferingamysteriousebbandflowofmood5、Is...
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发表于:2017-09-14
Andasnoonapproaches,thetidebeginstoebbaway.Ittookmorethan10,000yearsofdomesticationforhumanstocreatethevastbiodiversityinourfoodsupplythatwe'renowwatchingebbaway.Astheda...
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发表于:2017-08-10
Hisinfluenceisontheebb.Asthatstartedtoebb,Islowed.Thefloodandebbtidesalternateswitheachother.Freshordersfortheworld'sshipyardsareatalowebb.Thereisanaturalebbandflowofene...
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发表于:2018-07-09
It'saboutlifestyleandideas,peopleandmanners,thingsthatebbandflow.Thatebbtideisfullofdustfootprints,leavingsomesand,whereyoumayburythemostforthrightwounds....
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发表于:2019-02-05
问题详情:如图所示,是一*正点荷形成电场中的一条电场线,线段AB=BC,则()A.电场强度比较是EA>EBB.电势比较是φA<φBC.电势差比较是UAB>UBCD.检验电荷沿AC方向移动电场力不做功【回答】解:A、由题意,该...
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发表于:2019-11-14
问题详情:A、B两电源分别供电时其特*曲线如图所示,则下述正确的是()A.电源电动势EA=EBB.电源内阻rA=rBC.外电路电阻相同时,电源B的输出功率较大D.总电流相同时,电源A输出功率较大【回答】解:由闭...
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发表于:2017-07-29
Wesawthespringebbtide.Onthebeachaftertheebbtide,themulticoloredshellsareeverywhere.InLujiangCounty,amanofloftyidealshasnotgonethroughtheebbtide,buthestilldoesnotknowwhois...