下例哪个比例尺最大（    ）

   阅读下面短文，从短文后所给的A、B、C三个选项中选出能填入相应空白处的最佳选项。

    Jack is a 16-year-old boy. Last summer, he wanted to have a nice1.He asked his parents for the money.But his parents said he must get it by himself.But 2could he get one?

    One day，on his way home，he was thinking about this.Not many people wanted to ask children to work3them.Maybe he could sweep away the snow for the neighbours.However，it was not4.He had to wait a long time for that. Just at the moment，he saw Tom，one of his classmates，working in a5shop.

    "I could do that，"he thought.He asked Tom some questions.He learned that it took Tom about three hours a day to do the job6he could get twenty dollars each week.Then Tom gave him the telephone number of the book shop manager.Jack almost 7 home."Mum，I have good news to tell you，"Jack said.After he told his mother that，she said,"I think it's a8idea."

    "I will9the manager tomorrow,"said Jack，"After all，I'm going to be a businessman.''Jack's mother looked 10at him and smiled.

    After the summer holiday，Jack got the bike which he dreamt of.

如图，在△ABC中，AB=AC，点O在△ABC内，且∠OBC=∠OCA，∠BOC=110°，求∠A的度数=____．

阅读理解

    The following are the top things to do in Tampa Bay on the weekend.

    Santa and Ice Skating in St. Petersburg: After visiting Santa, go skating on a simulated (模拟的) ice place. 6:00 pm, North Straub Park, Fifth Avenue NE and Bayshore Drive, St. Petersburg. Free; $5 skating.(727) 893-7441.
    Christmas in the Wild: The animals come out at night for the zoo's new holiday party with carolers (唱圣歌者), performers, a Christmas tree, holiday foods, music and chances with Santa. 9:30 am, Lowry Park Zoo, 1101 W Sligh Ave., Tampa. $ 27. 95 seniors, $22. 95 aged 3—11, 2 and younger free. (813) 935-8552.
    Rudolph the Red Nosed Reindeer: The use of puppets (木偶) improves the attraction of this live version of the 1964 television classic. 3:00 pm, Ruth Eckerd Hall, 1111 N McMullen-Booth Road, Clearwater. $35—$ 100. (727) 791-7400.
    An American in Paris: The Tony Award-winning musical is about an American soldier, a secret French girl and a European city in the consequence of war. Through Dec. 25. 7:30 pm, Carol Morsani Hall at the Straz Center for the Performing Arts, 1010 N MacInnes Place, Tampa. $ 39— $ 90. (813) 229-7827.
    It's A Wonderful Life: A Live Radio Play: An ensemble (重唱) brings a few dozen characters to life with live, on-stage sound effects, to present the story of George Bailey, who considers taking his own life on Christmas Eve. 8:00 pm, American Stage Theatre Company at Raymond James Theater, 163 Third St. N, St. Petersburg. $ 30. (727) 823-7529.

下列关于油脂的叙述中，不正确的是