第7题: [单项选择]实际的域名解析是从( )开始的。 A. 根服务器 B. 本地域名服务器 C. 其父结点服务器 D. 其子结点服务器 参考答案:B 答案解析:[解析] 为了避免根域名服务器负担过重,实际的域名解析是从本地域名服务器开始的。
第8题: [单项选择]What does the writer think about the creation of new desert areas A. It is a natural development. B. The problem is not very serious. C. It is a very worrying problem. D. The situation will improve in time. 参考答案:C 答案解析:文章最后一句话作者是这样写的“At this rate there is a high risk that we will be confined to living on only 50% of t