依靠活塞在泵缸内左右移动,而吸入和压出液体的泵为()。
A.离心泵
B.旋转泵
C.往复泵
D.旋涡泵
参考答案:C
2012年4月1日,甲公司签订一项承担某工程建造任务的合同,该合同为固定造价合同,合同总金额为780万元。工程自2012年5月开工,预计2013年4月完工。至2012年12月31日止甲公司累计实际发生成本为656万元,结算合同价款300万元。甲公司签订合同时预计合同总成本为720万元,因工人工资调整及材料价格上涨等原因,2012年年末预计合同总成本为820万元。假定甲公司采用已发生的成本占合同估计总成本的比例计算确定完工进度,2012年12月31日甲公司对该合同应确认的预计损失为()万元。
A.40
B.100
C.32
D.8
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