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羧甲基纤维素钠

A. 调节渗透压
B. 调节pH值
C. 调节粘度
D. 抑菌防腐
E. 稳定剂
F. 滴眼剂中加入下列物质其作用是

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我国税收征收管理法规定,用票单位和个人应该按照规定向税务机关上缴已经使用或来使用的发票,然后由税务机关立即进行销毁。 ( )

A. 对
B. 错

The purpose of the requirements definition phase is to produce a clear, complete, consistent, and testable (16) of the technical requirements for the software product. During the requirements definition phase, the requirements definition team uses an iterative process to expand a broad statement of the system requirements into a complete and detailed specification of each function that the software must perform and each _( 17) that it must meet. The starting point is usually a set of high level requirements from the (18) that describe the project or problem. In either case, the requirements definition team formulates an overall concept for the system and then defines (19) showing how the system will be operated publishes the system and operations concept document and conducts a system concept review (SCR). Following the SCR, the team derives (20) requirements for the system from the high level requirements and the system and operations concept. Using structured or object-oriented analysis, the team specifies the software functions and algorithms needed to satisfy each detailed requirement.

A. producer
B. customer
C. programmer
D. analyser

磷酸盐缓冲溶液

A. 调节渗透压
B. 调节pH值
C. 调节粘度
D. 抑菌防腐
E. 稳定剂
F. 滴眼剂中加入下列物质其作用是

Soon, more of the information we receive via the Internet could come (31) in digital wrappers. Wrappers are made up (32) software code that’s targeted to do specific things with the data (33) within them, such as helping to define queries for search engines. They also keep (34) from (35) access to that code.

A. close
B. closed
C. enclose
D. enclosed

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