如图表示的是一个化合物的组成分析实验．

试根据实验数据求：

（1）完全反应后生成水的质量______．

（2）生成的水中氧的质量______．

（3）铜的氧化物中铜的质量______．

（4）铜的氧化物中铜和氧的质量比______．将化合物组成元素的质量比，分别除以各自的原子量，即可求得该化合物中各元素的原子个数比______．

（5）计算铜的氧化物中铜、氧的原子个数比______．

（6）将（5）的计算结果变为最简整数比，即求得铜的氧化物的化学式．试写出铜的氧化物的化学式______．

DOM is a platform- and language- （） 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 （） . DOM is a （） -based API to documents, which requires the whole document to be represented in （） while processing it. A simpler alternative to DOM is the event-based SAX, which can be used to process very large （） documents that do not fit into the memory available for processing.

DOM is a（）-based API to documents.

A．table

B．tree

C．control

D．event