题目

有一辆由汽油机提供动力的汽车，该车的输出功率与汽油机转速的关系如图所示。这辆汽车在某次测试时以90km/h的速度在水平公路上匀速行驶了10min，消耗1.1kg的汽油，此过程中汽油机的转速为2000r/min汽油的热值。 （1） 汽油机是一种将燃料燃烧产生的高温、高压燃气的内能转化为能的装置； （2） 该汽车在这段时间内行驶了多少路程？ （3） 1.1kg的汽油完全燃烧能产生多少热量？ （4） 此过程中汽油机的效率是多少？（百分数I will never forget what my old headmaster has taught me. 　31 when you are only 15 years of age, you do not remember most of the things that are taught by your teachers. However, this 　32 story is one such lesson that I will never forget. Every time I drift off course, I get 　33 of this story. It was a normal Monday morning he was 　34 the students on important things in life and about 　35 ourselves to what is important to us. This is how the story 　36 . An old man lived in a certain part of London, and he would 　37 every morning and get the train right to Central London, then 　38 at the street corner and beg. He would do this every 　39　 day of his life. He sat at the same street corner and had begged for almost 20years. His house was 　40　 and unpleasant smell came out of the house. The neighbors could not 　41 the smell anymore, so they called the police officers to 　42　 this place. The officers knocked down the door and cleaned the house. There were small bags of 　43 all over the house that the old man had collected over the years. The police counted the money, and they soon realized that the old man was a 　44　 . They waited outside his house, expecting to 　45 the good news with him. When he arrived home , he was met by one of the officers who told him that there was no 　46　 for him to beg any more. He said nothing 　47 , but went into his house and locked the door. The next morning he begged as usual. Obviously, this old man had no great plans, dreams or anything significant for his life. We learn nothing from this story 　48　 staying focused on the things we enjoy doing. We should remain true to our course, which may mean committing ourselves to things that people around us would normally 　49 ,let nothing else determine our fate, but ourselves. What makes us happy is what 　50 in the end, not what we get. 31．A．Normally　 　　　　 B．Exactly　 　　　 　　　 C．Personally　 D．Gradually 32．A．fluent　 　　　　　　 B．optional　 　　　　　 C．particular　 D．optimistic 33．A．informed　　 　　　 B．warned　 　　　　　 C．accused　 　 D．reminded 34．A．disputing　 　　　　　 B．claiming　 　　　　　 C．addressing　 D．advising 35．A．engaging　　 　　　 B．committing　 　　　 C．occupying　 D．adjusting 36．A．went　 　　　　　　　 B．continued　 　　　　 C．implied　 　　　 D．reported 37．A．tidy up　 　　　　　　 B．look up　 　　　　　 C．dry up　 　　 D．wake up 38．A．sit　 　　　　　　　　　 B．lie　 　　　　　　　　　 C．wait　 　　　　 D．sell 39．A．other　 　　　　　　　 B．single　 　　　 C．minor　 　　　 D．only 40．A．neat　 　　　　　　　　 B．odd　 　　　　　 　　C．delicate　 　　 D．messy 41．A．prohibit　 　　　　　 B．see　　 　　　　　　　 C．resist　 　　　 D．stand 42．A．clear　 　　　　　　　 B．destroy　 　　　　　 C．mop　 　　　　 D．wash 43．A．property　 　　　　 B．books　 　　　　　　 C．money　 　　 D．stamps 44．A．millionaire　 B．worker　　 　　　　　 C．cleaner　 　　 D．begger 45．A．appreciate　 　　　 B．divide　 　　　　　　 C．share　　 　　 D.ensure 46．A．possibility　 　　　 B．alternative　 　　　 C．need　 　　　　 D．demand 47．A．after all　 　　　　　 B．at all　 　　　　　　　 C．above all　 　　 D．all in all 48．A．rather than　　 　　 B．other than　　 　　　 C．more than 　　D．less than 49．A．overlook　　 　　　 B．advocate　 　 　　C．negotiate　 　 D．disapprove 50．A．wins　 　　　　　　　 B．admires　 　　　　　 C．matters　 　　 D．succeeds