题目

第III卷   读写能力测试 （共四部分，满分55分） 第一部分：阅读下列短文，按要求答题（共10小题；每题2分，满分20分）。 阅读下面短文，从A、B、C、D四个选项中选出最佳选项。 Today almost everyone knows computers and the Internet. If I ask you “What is the most important in your life?”, maybe you will say “Computers and the Internet.” The first computer was made in 1946. It was very big but it worked slowly. Today computers are getting smaller and smaller. But they work faster and faster. What can computers do? A writer ha某商场在销售旺季临近时 ，某品牌的童装销售价格呈上升趋势，假如这种童装开始时的售价为每件20元，并且每周（7天）涨价2元，从第6周开始，保持每件30元的稳定价格销售，直到11周结束，该童装不再销售。  （1）请建立销售价格y（元）与周次x之间的函数关系；  （2）若该品牌童装于进货当周售完，且这种童装每件进价z（元）与周次x之间的关系为，  1≤ x ≤11，且x为整数，那么该品牌童装在第几周售出后，每件获得利润最大？并求最大利润为多少？