如图所示,一圆心为O、半径为R的圆中有两条互相垂直的直径AC和BD,电荷量均为Q的正、负点电荷放在圆周上,它们的位置关于AC对称,+Q与O点的连线和OC间夹角为60°.两个点电荷的连线与AC的交点为P,取无穷远处电势为零,则下列说法正确的是( )
When was Harvard University established?( ) 参考答案:1636 点击查看答案进入小程序搜题你可能喜欢Which is right about American college?( ) 点击查看答案进入小程序搜题 New York Stock Exchange is the world's second largest stock exchange.( ) 点击查看答案&解析进入小程序搜题...
Furthermore, in the smaller cities, many schools were established around 40 years ago, and they lacked quality. Ajay did not set out to penetrate (渗透) Tier II and Tier III cities exactly. His mission was to make preschool education more accessible and standardized. “I did not want ...
Answer to: When was the Library of Congress system established? By signing up, you'll get thousands of step-by-step solutions to your homework...
they emit carbon they established scho they even put their i they even tried bribe they face ruddy they feel they followed her they followed me they gave up they get along beauti they give it to the y they give you a chanc they guarantee they had only a few d they had sound they ha...
You want to see her put into action the ideas she (71) Smith has already established her bonafides (真诚,善意) with White Teeth, The Autograph Man, and On Beauty. (72) , she insists that she’s a different writer from the 21-year-old who wrote White Teeth. "I don’t (73) ...
London wasestablishedbythe Romansaround 2,000yearsagoandhasbeencontinuallyinhabited (居住于)sincethen.Inallthattime,however,nobody hadtheideatoreplacealltheparks with bigbox storesorhighbuildings,whichmeansLondonalready hasamuchlowerurbandensity (密度)than mostof theworld?scities.Nowadaysaboutathirdofthecity...
When was French Indochina established?Sino-French War:During the early 1880s, the French began to encroach on Northern Vietnam, and in order to successfully claim the land, they needed China's assistance. However, negotiations between the French and Chinese broke down in 1883, and tensions ...
( )6.A.established B.introduced C.spotted D.ruined ( )7.A.putupwith B.stoodupfor C.tookchargeof D.setfootin ( )8.A.protection B.inspiration C.promotion D.attraction ( )9.A.accepted B.invented C.sought D.checked ( )10.A.new B.fair C.hard D.easy ( )11.A.blindness B.world...
故stuck意为“被接受,流传开来”,即became established。故选A项。(4)题详解: 推理判断题。根据最后一段中“What fascinates me about deejaying is the creativity. (关于DJ让我着迷的是其创造力。)”及“I go to elementary schools for the deaf and talk to them about motivation and believing in ...