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问题 解答题

一个等腰三角形，其中的两条边的长度是5cm和2cm，则它的周长是______cm．

答案

根据分析可知：该等腰三角形的三条边分别为5厘米、5厘米、2厘米，

5+5+2=12（厘米）；

答：它的周长是12cm．

故答案为：12．

单项选择题

DOM is a platform- and language- （66） API that allows programs and scripts to dynamically access and update the content, structure and style of WWW documents (currently, definitions for HTML and XML documents are part of the specification). The document can be further processed and the results of that processing can be incorporated back into the presented （67） . DOM is a （68） -based API to documents, which requires the whole document to be represented in （69） while processing it. A simpler alternative to DOM is the event-based SAX, which can be used to process very large （70） documents that do not fit into the memory available for processing.

A．table

B．tree

C．control

D．event
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单项选择题

铅字排版与电子排版的比较（）。

A、二者不相上下

B、前者优于后者

C、后者优于前者，但不能替代

D、后者优于前者，完成可以替代
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