如下图所示，V₁和V₂是完全相同的两个电压表，都有3V和15V两个量程，闭合开关后，发现两个电压表偏转的角度相同，则R₁和R₂两端的电压比为

最近，中国股市动荡和人民币贬值影响全球股市震荡，中国政府及时出手救市，展现了中国发展模式应对风险的能力，也再次生动说明了中国对全球的影响力以及中国与世界的水乳交融关系。这足以说明（  ）

①中国政府强力出手救市，增强了以经济为基础的综合国力

②在应对全球经济风险上，中国再次展现了负责任大国形象

③相较于发达资本主义国家，应对风险中国更具备体制上优势

④经济全球化导致风险全球化，威胁到了发展中国家的经济安全

  “Cool" is a word with many meanings．Its old meaning is used to express a temperature that is a little bit cold．As the world has changed，the word has had many different meanings．
  “Cool"can be used to express feelings of interest in almost everything When you see a famous car in the street，maybe you will say，“It's cool." You may think，“He's so cool," when you see your favorite footballer．
    We all maximize（扩大） the meaning of “cool". You can use it instead of many words such as “new" or "surprising"．Here's an interesting story we can use to show the way the word is used．A teacher asked her students to write about the waterfall（瀑布）they had visited．On one student's paper was just the one sentence, “It's so cool．Maybe he thought it was the best way to show what he saw and felt. But the story also shows a lack of words．Without “cool”，some people have no words to show the same meaning．So it is quite important to keep some credibility（可信性）．Can you think of many other words that make your life as colorful as the word "cool"？ I can．And I think they are also very cool．