某国家足球队教练在集训过程中发现球员U、V、W、X、Y、Z的最佳配合特点是：（1）V和X不能同时都在场上，也不能都不在场上。（2）只有U不在场上，V才不在场上。（3）如果W在场上，则X也要在场上。（4）如果Y和Z在场上，则W也必须在场上。那么，如果在U和Z都在场上的情况下，为了保持球员间的最佳配合，则可以推出以下哪项一定为真？（）
A．X在场上且Y不在场上
B．V在场上且Y不在场上
C．V和W都在场上
D． V和Y都不在场上
参考答案：B
解析：根据逻辑关系，（1）可以表述为：要么V，要么X在场上，二者必居其一。 根据题干要求，现在U在场上，那么据（2）可知，V在场上，再由（1）可知X不在场上。再由（3）可知，W不在场上。又已知Z在场上，根据（4）可知，Y也必然不在场上。 综上所述，除了X、W、Y不在场上以外，其余人都在场上。故选B。
| 阅读理解 |
| I'm a 21yearold boy,and this is my story. A month after I graduated from high school in 2004,I was coming home from swim practice and was involved in a car accident.I was so seriously injured that I was in a coma (昏迷) for over two months at Prince Georges Hospital. I died eight times during my coma and I couldn't talk or communicate when I woke up.Walking was never going to happen again due to all the extreme injuries.Just like my body,my dreams were shattered (破灭)．But I was not going to let my injuries stop me from living my dream. After 14 operations and 36 blood transfusions,I had to learn how to talk,eat,walk,shower,and live independently again.When I was out of hospital,I still had to go to outpatient therapy (门诊治疗) in Waldorf,Maryland.After spending a few months in a wheelchair,I took baby steps to walk on my own.It was a miracle (奇迹) that I could walk again,but I wanted to prove that I could not only walk,but run. When it came true,I wanted to get back in the pool again.After a few lung tests,I was able to go in the pool a little bit each week.After a few months of swim training,I began my freshman year at St.Mary's College of Maryland and became a proud member of the swim team. By telling my story,I want to make a positive influence on the world.I am just trying to live each day to the fullest and inspire other people to never give up on their dreams no matter how bad a situation is.I remember when I was still in my hospital bed,I would have my mom and dad push me around in my wheelchair to the other rooms to see the other patients and talk to them and their families.I wanted to let them know that everything was going to be okay.Somehow,things would work out for the best. |
| 1.When the car accident happened,the author________. |
| A. was a high school student B. had finished his high school education C. was a college student D. was returning home from a swim competition |
| 2. It can be inferred that the author________after he woke up from his coma. |
| A. was out of hospital B. was in surprise C. faced physical and mental challenges D. was worried about his lung |
| 3. What can we learn from the author's recovery? |
| A. Attitude is everything. B. Actions speak louder than words. C. Everything happens for a reason. D. A good beginning is half done. |
| 4.What procedure did the author follow to full recovery? a. ran b. received membership of the swim team c. trained for swim d. baby walked e. learnt to live all by himself |
| A. d,a,c,b,e B. e,d,a,c,b C. d,a,b,c,e D. e,d,a,b,c |
| 5. What does the author mainly want to show in the last paragraph? |
| A. His purpose of sharing his story. B. His painful experiences. C. His influence on others. D. His great achievements. |