【正确答案】正确答案：To whom it may concern, It is my great pleasure to recommend to you one of my graduate students, Wang Lin, who is applying for a Master's degree program in physics at your university. His performance in the courses was first-rate and is strong in mathematical analysis. When I needed an assistant to set up my lab and prepare samples, Mr. Wang volunteered. I was deeply impressed with his skills and attitude. Mr. Wang is not only intelligent, but also full of initiative. He is young and physically fit, too. I should be very grateful if you would consider my recommendation. Yours faithfully, Li Ming Professor Department of Computer Science Tsinghua University