题目

近几年，台州交警将“礼让行人”作为管理重点，“斑马线前车让人”已逐渐成为驾驶员的一种文明行为。如图所示，汽车以v1=36km/h的速度在水平路面上匀速行驶，在距离斑马线x=20m处，驾驶员发现有小朋友排着长L=6m的队伍从斑马线一端开始通过，于是立即刹车，最终恰好停在斑马线前。假设汽车刹车过程做匀减速直线运动，且忽略驾驶员的反应时间。 （1） 求开始刹车到汽车停止所用的时间和刹车过程汽车加速度的大小； （2） 假设驾驶第三部分：阅读理解（共20小题满分40分）阅读下列短文，从每题所给的四个选项（A、B、C、D）中选出最佳选项AMy friend, Emma Daniels, spent the summer of 1974 traveling in Israel. During her month long stay in Jerusalem she often went to a cafe called Chocolate Soup. It was run by two men, one of whom—Alex—used to live in Montreal. One morning when Emma went in for coffee, while chatting with her new friend Alex, she mentioned that she had just finished the book she was reading and had nothing else to read. Alex said he had a wonderful book she might like, and that he’d be happy to lend it to her. As he lived just above the cafe, he quickly ran up to get it. The book he handed to Emma just minutes later was Markings, a book by a former Secretary General of the United Nations (UN). Emma had never read it, nor had she ever bought a copy. But, when she opened it up, she was floored to see her own name and address inside the cover, in her own handwriting. It turned out that the summer before, at a concert back in Montreal, Emma had met a Californian who was in town visiting friends. They decided to exchange addresses, but neither of them had any paper. The man opened up a book he was carrying in his backpack (背包) and asked Emma to write her name and address inside. When he returned to California, he 1eft the book behind in Montreal, and his friend Alex kept it. When Alex later moved to Jerusalem, he took the book along. （  ）56. Alex lent Emma the book Markings, __________ . A. to show his friendliness to her B. to show his interest in reading C. to tell her about the importance of the UN D. to let her write her name and address inside（  ）57. How did Emma feel the moment she opened the book? A. Pleased.    B. Satisfied   C. Worried.      D. Surprised. （  ）58. We can learn from the text that the Californian __________ .A. met Emma at a concert B. invited Emma to a concert C. introduced Emma to his friend D. left Emma his backpack（  ）59. Who was supposed to be the first owner of the book? A. An official of the UN. B. A coffee shop owner. C. A friend of the author’s. D. Alex's friend from California.