题目

6本不同的书全部送给5人，每人至少1本，有几种不同的送书方法？ 答案：解析：依题意把送书的方法分两步完成.第一步：分组，将6本不同的书分成5组，一组2本书，其余四组各1本书，分组方法有种；第二步：将这五组书全部送给5人，每人分得一组书，有种送书方法，由乘法原理知共有·=1 800种不同的送书方法.LONDON (Reuters) — British milkman Steve Leech, who saved several shops and flats by putting out a fire with 320 pints of milk, was celebrating Thursday after winning a national bravery award.Leech, 35, named “Hero Milkman” by the National Dairymen’s Association, said that he had noticed smoke coming out of a shop in Cornwall, southern England, while delivering (递送) milk as usual a year ago.“I saw the flats up above and thought I’d better do something. So I kicked the door in and started pouring milk everywhere,” Lee told Reuters Thursday.“When firemen arrived, the fire was almost out,” he said. Firemen said he had helped save the lives of eight people living in the flats above the shops.“It was hard work opening all those bottles, especially since they have tamper-proof lids. But it was even harder trying to explain to my boss where all the milk had gone.”小题1: This is a(n) _______ from London.A．posterB．reviewC．advertisementD．news report小题2: Leech was awarded the prize for his _______.A．hard workB．brave behaviourC．inventionD．patriotic behaviour小题3: Which is the correct order of what Leech did about a year ago?①The fire was almost put out.              ②He kicked the door in.③He noticed smoke coming out of a shop. ④He delivered mile as usual.⑤He poured milk everywhere.A．①②③④⑤B．④②③⑤①C．③④①②⑤D．④③②⑤①小题4:The underlined sentence in the last paragraph suggests (暗示) that tamper-proof lids add to the difficulty of _______ those bottles.A．stealingB．breakingC．openingD．wasting小题5: Which is NOT TRUE according to the passage?A．Leech put out a fire with milk at the age of 34. B．Cornwall is in the north of England.C．Leech saved eight people in the shops.D．The fire was already out before firemen arrived.