题目内容

下面程序的运行结果是()。 include＜stdio.h＞ main() {int a,b，c，n； a=2；b=0；c=1；n=1； while(n＜=3) {c=c*a；b=_b+c；++n；} printf("b=%d"，B)； }

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Part A
Suppose you will hold an informal dinner at your home to give a warm welcome to Mr. and Mrs. Robert who have just returned from the United States. You're required to write a letter of invitation to Mr. and Mrs. White, telling them about:
1. the reason to hold the informal dinner
2. time and place of your informal dinner
You should write approximately 100 words. Do not sign your own name at the end of your invitation. Use "Wang Lin' instead. You do not need to write the address.

【说明】
某公司采用100M宽带接入Internet，公司内部有15台PC机，要求都能够上网。另外有2台服务器对外分别提供Web和E-mail服务，采用防火墙接入公网，拓扑结构如下图所示。
如果防火墙采用．NAPT技术，则该单位至少需要申请(1)个可用的公网地址。

部门B中主机PCI的默认网关地址应配置为(4)才能访问Internet。

Narrator
Now read the passage about trees in the city. You have 45 seconds to read the passage. Begin reading now.
Narrator
Now listen to a part of a lecture on this topic.