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  3. What do we know from the first paragraph? What does the author mean by "the blocking of some ’questionable’ site was not compre

What do we know from the first paragraph? What does the author mean by "the blocking of some ’questionable’ site was not compre

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问题 What do we know from the first paragraph?
What does the author mean by "the blocking of some ’questionable’ site was not comprehensive" (Line 1, Last Paragraph)?
选项 A、Some websites escape from being detected.
B、The NIS program is not effective in other countries at all.
C、All the websites in New Zealand should be included in the list.
D、The website Playboy should be included in the list of no-go area.
答案A
解析 语义理解题。文章最后一段前两句指出"但是这种系统并不尽善尽美。有限测试发现它对有问题的网站的封锁并不全面"。接下来，作者举例说明：比如进入美国知名的"花花公子"网站，结果就会马上出现了一个封锁信息，报告这是一个"错误分类的"网站。相反，你可以在其他国家，比如新西兰找到自称为"致力于为全球所有热情者提供性欲、性幻想及任何一点非同寻常的东西"的色情网站。可见最后一段中的例子是为了说明该段主题句(Limited testing found the blocking of some "questionable" sites was not comprehensive．)的支持性细节。从例子可以推出该主题句的意思是"一些有问题的网站没有被发现"。
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