题目

高速铁路客运专线建成通车使人们出行越来越方便， “和谐号”动车组最高车速可达350km／h。G2009次列车下午17：10从郑州发车，l9：08到达西安，全长505km,则这次列车的平均速度约为___________km／h。为了确保行车安全，列车上的监控系统，通过对高速运转车轮的热辐射产生的一种不可见光进行检测，实现对车轮温度的实时监控。这种不可见光是________。  Last week, the manager of an old jeweler's shop received a letter marked "personal". As he was very busy, the letter lay on his desk till teatime. When he opened it, a $100 note fell. out onto his desk. With the note was a short letter. This is what it said: Dear sir, I got engaged (订婚的) forty years ago. Unfortunately at that time there was a lot of unemployment and I lost my job. I was out of work for about six months before I got another one. Of course I was very short of money.I came to your shop to buy a wedding ring one day. The assistant brought some rings for me to have a look, later she was called away, and then I put one of the rings into my pocket. When she came back, I said I did not know the size of my girlfriend's finger. So I left the shop without paying for the ring. My wife died a month ago, and the fact that I never paid for her ring has been on my conscience(让我良心不安) all these years. I always feel guilty about that. At that time the ring cost $ 20, and I think that is about five times- $100 at today's price. Now I am sending you that amount. Yours truly, A customer After reading the letter, the manager said, "Well, well, well, life is full of surprise!"小题1:The ring that the customer put into his pocket was_______ at that time.A．$20B．$50 C．$100D．$400小题2:The underlined word "unemployment" means "_______" in Chinese.A．辞职B．就业C．悲伤D．失业小题3:How long has the customer's wife been dead?A．A week.B．A month.C．A year.D．Two months.小题4:Which is NOT true according to the passage?A．The manager opened the letter by himself.B．The manager thought life was full of surprise.C．When the customer's wife knew the fact, she was impatient.D．The customer always feels sad for not paying for the ring years ago.