声控开关主要应用了信息技术中的（）
A.计算机技术
B.传感技术
C.微电子技术
D.通信技术
参考答案：B
对知识的比较与归纳是学习化学的重要方法，现有以下三个化学方程式：
①Cu（OH）2△CuO+H2O；②CaCO3高温CaO+CO2↑
③Cu2（OH）2CO3△2CuO+CO2↑+H2O 通过比较发现：
（1）它们有许多相似之处，请写出其中的两条：①______；②______．
（2）请你再写出一个具有上述特点的化学反应方程式：______．
DOM is a platform-and language- (1) 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 (2) DOM is a (3) -based API to documents, which requires the whole document to be represented in (4) while processing it. A simpler alternative to DOM is the event-based SAX, which can be used to process very large (5) documents that do not fit into the memory available for processing.
(2)
A．text
B．image
C．page
D．graphic
