【单选题】The founder of quantum mechanics (量子力学) and the inventor of the uncertainty principle, Werner Heisenberg was born in Wurzburg and brought up in Munich, where he entered the university in 1920 to study...
【简答题】Dear Peter , I got back from my pleasant visit to you in Quebec. I 1 that it was so easy for Americans to cross the border between Canada and the United States. My friend Mr. Smith, who 2 me back, has...