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问题 单项选择题

（）是允许间隙的变动量，它等于最大间隙与最小间隙之代数差的绝对值，也等于互相配合的孔公差带与轴公差带之和。

A.配合公差

B.间隙公差

C.以上都对

D.以上都错

答案

参考答案：C

单项选择题

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.

The document can be further processed and the results of that processing can be incorporated back into the presented （）.

A．text

B．image

C．page

D．graphic
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单项选择题

柴油机一般采用的是（）油量控制机构。

A.离心式

B.真空式

C.齿轮式

D.拨叉式
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