题目

石油天然气集团在四川发现了最大的天然气田，预计储量达7000亿立方米。天然气的主要成分是甲烷，还含有一定量的乙烷、丙烷等可燃性气体。下列有关的说法不正确的     A．甲烷与丙烷互为同系物     B．甲烷是烃类物质中氢的质量分数最高的化合物     C．乙烷和氯气在光照的条件下可发生取代反应，生成多种氯代烃     D．甲烷、乙烷、丙烷中的化学键都是极性共价键Section B (10 marks) Directions: Read the following passage, Answer the questions according to theinformation given in the passage.Secret Santas On Christmas morning, Linda wakes up, and tries to imagine the wide-eyed surprise of children in another household as they unwrap the presents she carefully chose for them. Linda has never met the children, but that’s all part of the joy of giving as secret Santas, she says. "It's an amazing feeling to buy gifts on an anonymous (匿名的) basis," says Linda."It brings a whole new meaning to the holidays." Linda and Tony are an American couple living in Toronto, Canada, and Linda did charitable work as a member of the American Women's Club of Toronto. As the name suggests, members are U.S. citizens living in Toronto, who join together for fellowship and community service. To find her "adopted" family, Linda goes to the local schools and requests a wish list for a family that's struggling to survive. Last year she helped a single mother with three children. The mother works as a cleaning lady in a nursing home. "The list is always heartbreaking. They have an opportunity to ask for anything and do just the opposite, asking for basic clothes or simple toys," she says. "We always buy the kids a new winter coat, hats, and gloves." She also buys gifts for the parents. Last year Linda asked the mother for a second wish list--one that didn't include the basics. "Every child should have a Christmas that sticks with them for a lifetime." She purchased iPods for the two older children and a video game system for the youngest."I have learned a very valuable lesson in all of this," says Linda. "Pay attention to what's going on in your own backyard--no matter where you live." The joy of giving as secret Santas is much sweeter when the gift is anonymous.81. What reaction does Linda imagine the children will have? (No more than 5 words)                                       (2 marks)______________________________________________________________________________                                                                         82. Why did Linda join the American Women's Club of Toronto? (No more than 10 words)                                         (2 marks)______________________________________________________________________________                                                                         83. Why did Linda ask for a second wish list? (No more than 15 words)                                         (3 marks)______________________________________________________________________________                                                                         84. What kind of people does "secret Santas" in the passage refer to? (No more than 12 words)                                         (3 marks)