铡刀剪的剪切力和剪切角度成（）。

发热时机体心血管系统功能有那些变化？

某桥梁工程，施工单位为了防止钻孔灌注桩出现断桩现象和桥梁钢筋混凝土结构出现构造裂缝，采取了一系列的措施。由于施工单位的措施得力，该桥梁工程未出现钻孔灌注桩断桩和钢筋混凝土结构裂缝现象。

在钻孔灌注桩钻孔过程中，应保持护筒中泥浆施工液位一定高度，形成（）液位差，以保护孔壁免于坍塌。

A．0～1m

B．1～2m

C．2～2.5m

D．2.5～3m

请仔细观察下图的纪念墙，说法正确的是

A．它是法国大革命的历史见证

B．它是巴黎公社革命的导火线

C．它是无产阶级大无畏精神的缩影

D．它是马克思恩格斯友谊的体现

锅炉的汽、水压力系统及附属装置组装完毕后，应进行水压试验，用以检查胀口和焊口的质量。

DOM is a platform and language- (51) 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 (52) . DOM is a (53) -based API to documents, which requires the whole document to be represented in (54) while processing it. A simpler alternative to DOM is the event-based SAX, which can be used to process very large (55) documents that do not fit info the memory available for processing.

A．document

B．processor

C．disc

D．memory