联合收割机动、定刀片之间的间隙过大，则切割作物困难，如不及时调整，会使刀片产生（），

The park _________by the cleaners every two days.

A．is swept

B．was swept

C．has swept

D．will sweep

装有主要通风机的井口，外部漏风率在有提升设备时不得超过（）

A.10%

B.5%

C.15%

D.20%

任选其中五项论述企业享受减税免税优惠而减少的应纳税所得额和应纳税额。

作为施工质量验收依据之一的工程施工图纸应包括由发包方确认并提供的图纸以及（）。

A．设计单位自行变更的图纸

B．施工方案图纸

C．按规定程序和手续实施变更的图纸

D．业主的口头变更要求

DOM is a platform-and language-____(66)___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　incoporporated back into the presented ___(67)____.DOM is a ___(68)___-based API to　documents ,which requires the whole document to be represented in ____(69)___while　processing it .A simpler alternative to DOM is the event –based SAX,which can be　used to process very large ___(70)___documents that do not fit info the memory　available for processing.

（67）处填（）。

A．text

B．image

C．page

D．graphic