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阅读以下关于网络日常管理、维护的技术说明，根据要求回答问题1～问题6。
【说明】
电子商务公司A，B的网络互联的拓扑结构图如图1-11所示。其中，各接入层交换机均为可远程web管理和命令行管理的24口交换机。

客户小郭要求将其计算机通过电话线宽带接入Internet，则小郭的计算机通常需要添加哪些外部网络设备?除此之外，小郭还需从网络服务提供商(ISP)获得哪些信息才能宽带接入到Internet?

A.shangxueba.cn/images/ct_crpnmxm_crpnmxfuzaa1_00545(20096).jpg'

【参考答案】

ADSL MODEM和信号滤波器(或信号分离器)网络服务提供商(ISP)提供的宽带拨号连接号码(即用户名)和密码信息......

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N个有序整数数列已放在一维数组中，给定下列程序中，函数fun()的功能是：利用折半查找算法查找整数m在数组中的位置。若找到，则返回其下标值：反之，则返回-1。折半查找的基本算法是：每次查找前先确定数组中待查的范围：low和high(low＜high)，然后把m与中间位置(mid)中元素的值进行比较。如果m的值大于中间位置元素中的值，则下一次的查找范围放在中间位置之后的元素中；反之，下次查找范围落在中间位置之前的元素中。直到low＞high，查找结束。请改正程序中的错误，使它能得出正确的结果。注意：不要改动main函数，不得增行或删行，也不得更改程序的结构。试题程序： include ＜stdio.h＞ define N 10 *************found********************* void fun(int a[],int m) { int low--0,high=N-l,mid; while (low＜=high) { mid=(low+high) 2; if(m＜a[mid]) high=mid-1; *************found********************* else if(m＞=a [mid]) low=mid+1; else return(mid); } return(-1); } main () { int i,a[N]={-3,4,7,9,13,24,67,89,100,180},k,m; printf ('a数组中的数据如下: '); for(i=0;i＜N;i++) printf('%d',a[i]); printf ('Enter m: '); scanf ('%d', &m); k=fun (a,m); if (k＞=0) printf ('m=%d, index=%d n',m, k); else printf('Not be found! n'); }

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听力原文： RED TIDES Different events can change the balance of sea life. Red fides are an example. These can happen in oceans, rivers or lakes, anywhere in the world. What happens is that algae suddenly increase in numbers. Algae are sit. e-celled organisms. They are a normal part of sea life. As they spread, or bloom, the water may turn red or brown. Sometimes the water does not change color at all. But deadly algae could still be present. Some kinds of algae produce a strong poison. This can build up in shellfish that eat the algae and make them poisonous, but not kill them. Other kinds of algae may kill sea life by reducing oxygen levels in the water. In some red fides, thonsands of dead fish appear on beaches. Scientists do not know exactly why red tides happen. But they say a combination of conditions all play apart. These include water temperature, nutrients in the water and water flow. Pollution could also play a part (1)

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