题目

2.8g某单质A能从盐酸中置换出0.1g H2，同时生成ACl2；另一元素B，它的最高价氧化物的化学式为BO3。在B的氢化物中，B的质量分数为94.1％。    计算A、B两种元素的相对原子质量。 答案：Ar(A)=56        Ar(B)=32(NEW YORK) A French tourist highly praised for rescuing a two-year-old girl in Manhattan said he didn’t think twice before diving into the freezing East River. Tuesday’s Daily News said 29-year-old Julien Duret from France was the man who left the spot quickly after the rescue last Saturday. He lifted the little girl out of the water after she fell off the bank at the South Street Seaport museum. He handed the girl to her father, David Anderson, who had dived in after him. “I didn’t think at all,” Duret told the Daily News. “It happened very fast. I reacted very fast.” Duret, an engineer on vacation, was walking with his girlfriend along the pier(码头) when he saw something falling into the water. He thought it was a doll, but realized it was a child when he approached the river. Immediately, he took off his coat and jumped into the water. When he reached the girl, she appeared lifeless, he said. Fortunately, when she was out of the water, she opened her eyes. Anderson said his daughter slipped off the bank when he was adjusting his camera. An ambulance came later for her, said Duret, who was handed dry clothes from onlookers. Duret caught a taxi with his girlfriend shortly after. The rescue happened on the day before he left for France. Duret said he didn’t realize his story of heroism had greatly moved New York until he was leaving the city the next morning. “I don’t really think I’m a hero,” said Duret. “Anyone would do the same thing.”1.Why was Duret in New York? A. To meet his girlfriend.              B. To spend his holiday.C. To work as an engineer.              D. To visit the Andersons.2.What did Duret do shortly after the ambulance came?A. He was interviewed by a newspaper.B. He went to the hospital in the ambulance.C. He disappeared from the spot quickly.D. He asked his girlfriend for his dry clothes.3.Which of the following is TRUE according to the passage?A. Duret thought twice before he jumped into the cold water.B. Duret dived into the water before the girl’s father.C. The rescue happened on the day Duret left for France.D. Duret didn’t think he was brave enough to be a hero.4.What is probably the headline of this news report?A. A Careless Father                   B. A Poor Girl C. Warm-hearted Onlookers            D. Brave Frenchman Found