第三部分：阅读理解（共20小题，每题2分，满分40分）
阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。
Sam, an unemployed piano tuner, said it was only the second thing he had ever won in his life．The first thing was an Afghan blanket at a church raffle（抽奖） when he was 25 years old．But this was much bigger: it was $120,000! He had won the Big Cube, a state lottery( * * ) game．To win, a contestant must first guess which number a spinning cube will stop on．The cube has six numbers on it: 1X, 10X, 50X, 100X, 500X, and 1000X．If he is correct, the contestant must then guess which of two selected variables（变量） is going to be greater．So, just guessing which number appears on the cube does not guarantee that you will win any money．
Sam correctly guessed 1000X, but he still had to choose between two variables．One variable was the number of cars that would run the stop sign at Hill Street and Lake Avenue in six hours．The other variable was the number of times that a teenage boy would change TV channels in a three-hour period．This was a tough decision．
Finally, Sam flipped a coin．It came up heads, so Sam picked the teenager．He picked right．The stop sign was run only 76 times, but the teen clicked 120 times．Sixty-year-old Sam jumped for joy, for he had just won 1000 times 120, or $120,000．Sam dreamily left the lottery studio．Talking excitedly on his cell phone while crossing the street, he got hit by a little sports car．
Sam is slowly getting better．He was in the hospital for a month．His hospital bill was $110,000．And the insurance company for the little sports car’s owner sued（起诉）Sam for $9,000 worth of repairs．Also, Sam still has to pay federal taxes on his winnings．Sam doesn’t play the state lottery any more．He says it’s better to be unlucky．
56．What can be inferred about Sam from the passage?
A．He always has bad luck. B．He seldom goes to a raffle.
C．He is a very careful person in life. D．He used to be crazy about lottery tickets.
57．Which of the following played a vital role in Sam’s winning the big prize?
A．The cube. B．The coin. C．The blanket. D．The stop sign.
58．Which of the following is TRUE according to the passage?
A．The lottery game was a complete lie.
B．Sam was quite familiar with the boy.
C．The owner of the car is now in hospital.
D．Sam will have none of the prize money left.
59．What could be the best title for the passage?
A．Curiosity killed the cat B．Joy puts heart into a man
C．Extreme joy ends in sorrow D．A bird in hand is worth two in the bush
H++S2-，当向其中加入少量CuCl2粉末时，发生反应：Cu2++S2-=CuS↓产生黑色沉淀，由于消耗了S2-，所以电离平衡正向移动，c(H+)增大，则pH减小。C．TiCl4是强酸弱碱盐，水解消耗水电离产生的OH-，产生Ti(OH)4.水解反应是吸热反应，所以加热条件下可促进TiCl4水解，产生更多的Ti(OH)4。然后过滤、洗涤Ti(OH)4，加热分解就可以制备TiO2固体。正确。D．铜制器皿放置过程中会生成铜绿是因为发生了反应：2Cu+O2+H2O+CO2=Cu2(OH)2CO3。错误。