正确答案: C

沿着电场线方向,电势越来越低

题目:关于同一电场的电场线,下列表述正确的是

解析:电场是客观存在的,而电场线是假想的,A错.电场线越密的地方电场越大B错.沿着电场线的方向电势逐渐降低C对.负电荷沿着电场线方向移动时电场力做负功电势能增加D错

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举一反三的答案和解析:

  • [单选题]Thebiggestwhaleis___bluewhale,whichgrowstobeabout29meterslong—theheightof___9-storybuilding.
  • the;a


  • [单选题]
  • toward


  • [单选题]⒐对本文分析正确的两项是__________(6分)
  • 作品叙述杨柳桃杏时暗含时光的流动,表现北京“春脖子短”。

  • 解析:CF

  • [单选题]听到的是京腔京韵的侯宝林的相声,看到的却是卡通人物在说学逗唱;看到的是原汁原味的生旦净末丑的表演,听到的却是流行歌曲的韵律。借助Flash等现代化手段,传统戏曲也逐渐地被“80后”甚至“90后”所喜欢。传统戏曲的这一个“漂亮转身”启示我们( )
  • 文化创新不仅需要继承更需融入时代元素


  • [单选题]I can be a teacher. I’m not a very patient person.
  • never


  • [单选题]根据下面内容,回答 60 ~63 题: BComputer programmer David Jones earns£35,000 a year designing new computer games, yet he cannot find a bank ready to let him have a credit card(信用卡).Instead,he has been told to wait another two years,until he is 18.The 16-year-old works for a small firm in Liverpool, where the problem of most young people of his age is finding a job.David’s firm releases(推出) two new games for the fast growing computer market each month.But David’s biggest headache is what to do with his money.Even though he earns a lot, he cannot drive a car, take out a mortgage(抵押贷款),or get credit cards.David got his job with the Liverpool-based company four months ago,a year after leaving school with six O-levels and working for a time in a computer shop.“I got the job because the people who run the firm knew
  • He has a handsome income.


  • [单选题]People working together in an office used to ____________.
  • know better one another's handwriting

  • 解析:【解析】由第三段“There was a time when our workdays were filled with little letters, and we recognized one another’s handwriting the way we knew voices or faces”可知

  • [单选题]What is the text mainly about?
  • The finding of a forgotten hero.


  • [单选题]姜科植物花中,雄蕊在发育上原来可能为( )。
  • 6


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