题目

8分）、已知，，请按下列要求分别求出的值.（1）      四舍五入到十分位，并指出近似的有效数字；（2）      四舍五入到个位，并指出近似的有效数字.                  答案：   解析:略 19、You are driving alone in your car on a wild, stormy night, when you pass by a bus stop, and you see three people waiting for the bus: 1. An old lady who looks as if she is about to die. 2. An old friend who once saved your life. 3. The perfect partner you have been dreaming about. Which one would you choose to offer a ride to, knowing that there could only be one passenger in your car? Think before you read on … This is a question that was once actually used when you are looking for a job. You could pick up the old lady, because she is going to die, and you should save her first; Or you could take your old friend because he once saved your life and this would be the perfect chance to pay him back. However, you may never be able to find your perfect mate again. The person who was chosen （out of 200 people） had no trouble coming up with his answer. He simply answered, “I would give the car keys to my old friend and let him take the lady to the hospital. I would stay behind and wait for the bus with the partner of my dreams.” Sometimes, we get more if we are able to give up our thought limitations（限制）. Never forget to “Think Outside of the Box.” 1. The reading is mainly about ________. 　A. the correct answer to the three difficult questions B. a good reason to make no answer C. good answers not coming out of answering questions directly D. the three questions being hard to answer 2. The above three questions could appear when someone ________. 　A. drives a car on a wild, stormy night            B. works with 200 people C. is ready to answer                                    D. needs to find work 3. From the reading we can know that ________. 　A. the three question are difficult to anyone     B. some people may give a reasonable answer C. no people can make good answers                     D. only a good driver can make a perfect answer 4. The word “Box” in the reading means ________. 　A. cars　　                                                        B. the three people waiting for the bus C. different answers                                      D. the questions themselves 5. The writer of the reading thinks ________. 　A. good answers are always coming when we think outside of the box B. good drivers always make correct answers C. no one can give a good answer to the three questions D. everyone chooses the easiest question to answer