根据首字母填 Yang Lei said that teaching the students in china’s rural a________ changed her life

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• 根据首字母填 Yang Lei said that teaching the students in china’s rural a________ changed her life
• 英语翻译Teaching high school students in a poor mountain village in Gansu province may not sound like fun to you.However,in changed the life of Yang Lei from Beijing.The Peking University graduate first went there as a volunteer on a one-year program.The program was started by the Ministry of Education and the chinese young pioneers.Every year they send 100 volunteers to teach in China's rural areas.
• y=x+1/x(对勾函数）的值域如何来求?
• 利用对勾函数求y=x/1+x平方的值域