题目

某班组织20名同学去春游，同时租用两种型号的车辆，一种车每辆有8个座位，另一种车每辆有4个座位．要求租用的车辆不留空座，也不能超载．有 2 种租车方案． 答案：考点：二元一次方程的应用． 分析：设租用每辆8个座位的车x辆，每辆有4个座位的车y辆，根据车座位数等于学生的人数列出二元一次方程，再根据x、y都是正整数求解即可． 解答：解：设租用每辆8个座位的车x辆，每辆有4个座位的车y辆， 根据题意得，8x+4y=20， 整理得，2x+y=5， ∵x、y都是正整数， ∴Einstein often received invitations to explain his theories at different universities. On these trips, his driver was always the same man called Hans. Hans often said to him. “It is a pleasure to drive a talent like you, Dr Einstein.”One evening, on their way to a university, Einstein said, “I’m so tired. I wish I could refuse to give my lecture(讲座) tonight, Hans, but I don’t want to let my audience down.”“I know what to do,” said Hans. “I can give the lecture for you. You can trust me. I’ve listened to your lecture so many times that I’ve learnt it by heart. No one knows you at this university, so they won’t find out.”So, they changed places. At the university, Hans was guided to the front of the hall. Einstein took a seat, listened to Hans give his lecture without difficulty, and joined in the applause (掌声) at the end.However, before Hans left, a man shouted, “I’d like to ask you a question.” He then asked a difficult question and Hans had no idea what he was talking about.Einstein turned pale. “Oh no! ,” he thought. “Now we’re in trouble.” But Hans just laughed and said, “That’s such an easy question that even my driver can answer it. Hans, please…”Einstein stood up and answered the question perfectly.They left the university, with Einstein driving. A little later, Hans offered to drive. “No, ” laughed Einstein. “It’s a pleasure to drive a talent like you, Hans.”1.Which of the following is the most suitable for “ ”?A. Lies have short legsB. Rome was not built in a dayC. A miss is as good as a mileD. Life is not all roses2.Just as the mind map, the story can be divided into five parts: opening, rising action, turning point, falling action and ending. Which do you think is the turning point of it?A. Einstein answered the question perfectly.B. A man asked a difficult question.C. Hans offered to give a lecture for Einstein.D. Hans asked Einstein to answer the question.3.What would be the best title for this story?A. Great Minds B. An unforgettable LectureC. Two Talents D. An Easy Question