第16题: [多项选择]PART ONE 参考答案:The chart shows how much of the turnover of a certain company was contributed by each of its three main product areas in the years B000, B00A and B00B. Generally speaking, washing machines are the strongest and heater the weakest of the three products. This basic difference between the two became even more pronounced in this three years period with the contribution of washing machines to the company’s turnover rising from thirty percent in B000 to thirty-four percent in B00B, while the share which the heaters contributed dropped from sixteen percent in B000 to seven percent in B00B. The contribution of the third product--cookers--remained relatively steady during this period; it dropped slightly from twenty-two to twenty percent in B00A, but recovered again in B00B. 答案解析:[解析] 这是一篇非常优秀的习作，出色地完成了题目要求的写作任务。全文表达清晰、语意连贯，涵盖了图表中的主要内容。作者规划了段落，布局合理，结构清晰，明确表达了要表述的内容。第二段段首所用“Gener
第35题: [单项选择]在生成树协议(STP)IEEEE802.11d中，根据______来选择根交换机。 A. 最小的MAC地址 B. 最大的MAC地址 C. 最小的交换机ID D. 最大的交换机ID 参考答案:A 答案解析:[解析] STP(Spanning Tree Protocol，生成树协议)就是把一个环形的结构改变成一个树形的结构。用来将物理上存在环路的网络，通过一种算法，在逻辑上阻塞一些端口，来生成一个逻辑上的
