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问题 单项选择题

夹具总图上定位元件与导引元件的位置精度要求是为了保证______精度。

A．加工面本身尺寸

B．加工面本身形状

C．加工面与定位基准面的位置

D．几个加工面间的尺寸

答案

参考答案：C

单项选择题

DOM is a platform-and language- (41) 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 (42) . DOM is a (43) -based API to documents, which requires the whole document to be represented in (44) while processing it. A simpler alternative to DOM is the event -based SAX, which can be used to process very large. (45) documents that do not fit info the memory available for processing.

（45）是（）

A.XML

B.HTML

C.script

D.web
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判断题

没有生物小循环，就没有土壤系统。
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