如图所示,a、b带等量异种电荷,MN为a、b连线的中垂线,现有一带电粒子从M点以

题型:多选题

问题:

如图所示,a、b带等量异种电荷,MN为a、b连线的中垂线,现有一带电粒子从M点以一定的初速度v射出,开始时的一段轨迹如图中实线所示,若不计重力的作用,则在飞越该电场的过程中,下列说法中正确的是(   )

A.该粒子带正电

B.该粒子的动能先减小后增大

C.该粒子的电势能先减小后增大

D.该粒子运动到无穷远处后,其速度大小一定仍为v

考点:电场强度的叠加电势能
题型:多选题
My dream is to become an orthodontist, fly to new heights, and impact the world. Ever since the day I got braces(牙箍), I have thought about how    it would be for me to become an orthodontist and make other    like me have more beautiful smiles. The thought of helping other people overcome the fear of their    or self-esteem became so real to me the day that I got my    off two years later. After a long thought, I finally came to a(n)    that I wanted to do my senior exit project on orthodontics. I am in the      of doing my project now and I cannot wait to see the wonderful    that I’m going to achieve. In the long run, I know it will be a great       to me down the road, opening doors to my     path. Another goal in my life is to fly to new    and go where no one else has    to go before. I am a big leader at my school and I try to do new things that are    in order to make things successful. I try to reach to the highest in order to make every event and idea      “with a bang!” I also want to do things to      the world somewhere down the road. After seeing friends go into    , I have thought about being a      missionary(传教士) in a third world country for a couple of summers after I       from the high school. I think it would be     to impact the lives of powerless and torn people who need     that seems unimaginable to them. I think     more people reached out and conquered their dreams to help other people achieve theirs, this world would be a whole lot better of a place.
小题1:
A.tiresomeB.occasional C.coolD.fortunate
小题2:
A.teensB.adultsC.doctorsD.patients
小题3:
A.imageB.operationC.figureD.mouth
小题4:
A.capsB.toolsC.booksD.braces
小题5:
A.stopB.decisionC.conclusionD.end
小题6:
A.endB.processC.beginningD.trouble
小题7:
A.sceneB.occupationC.startD.goals
小题8:
A.advantageB.honorC.chanceD.pity
小题9:
A.graduationB.businessC.careerD.life
小题10:
A.locationsB.heightsC.interests D.events
小题11:
A.hopedB.expectedC.neededD.dared
小题12:
A.cared forB.unheard ofC.put forwardD.thought of
小题13:
A.turn outB.move offC.go outD.die out
小题14:
A.changeB.developC.impactD.destroy
小题15:
A.missionsB.difficultiesC.trapsD.films
小题16:
A.long-termB.professionalC.short-termD.part-time
小题17:
A.attendB.graduateC.dislikeD.abandon
小题18:
A.tiresomeB.harmfulC.astonishingD.remarkable
小题19:
A.assistanceB.faithC.moneyD.laws
小题20:
A.sinceB.unlessC.although D.if
题型:多选题

一般情况下,供给交叉弹性系数为负值,表明商品之间是( )

A.互替品
B.互补品
C.必需品
D.奢侈品

题型:多选题

在城乡规划管理体制中,国务院城乡规划主管部门的主要职责包括( )。

A.负责全国城镇体系规划的组织编制和报批

B.对举报或控告的受理、核查和处理

C.负责建设项目选址意见书的核发

D.规划编制单位资质等级的审查和许可

E.对全国城乡规划编制、审批、实施、修改的监督检查和实施行政措施

题型:多选题

膳食调查的方法不包括( )

A.询问法

B.记账法

C.称重法

D.生化检查法

E.化学分析法

题型:多选题

在主债权消灭的情形下,动产抵押合同双方当事人或者其委托的代理人可以到原动产抵押登记机关办理注销登记。

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