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用邻菲罗啉法测定锅炉水中的铁,pH需控制在4~6之间,通常选择()缓冲溶液较合适。

A. 邻苯二甲酸氢钾
B. NH3—NH4Cl
C. NaHCO3—Na2CO3
D. HAc—NaAc

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美国质量管理专家朱兰博士提出的"质量管理三部曲"包括质量策划、质量控制和()。

A. 质量保证
B. 质量检验
C. 质量改进
D. 质量监督

国家建立健全同经济发展相适应的社会保障制度是2000年《宪法》修正案的内容之一。

A. 正确
B. 错误

根据《国内航行海船法定检验技术规则》(2004)及2006年修改通报,以下哪些航区或航线的客船为II级客船。()

A. 航行于沿海航区,航程距庇护地距离≥10nmile的客船;
B. 航行于近海航区的客船;
C. 上海—宁波航线的客船;
D. 海口—湛江航线的客船

Some xSeries servers support 4-way memory interleaving and some support 2-way interleaving. In both types of interleaving, the data is accessed 256 bits at a time. How is this 256-bit data access achieved with 2-way interleaving?()

A. The DIMMs used for 2-way interleaving are double the width of DIMM used in 4-way interleaving.
B. The DIMMs used for 2-way interleaving are 64-bit wide and data bits are accessed both on the rising edge and falling edge of the clock cycle.
C. The DIMMs used for 2-way interleaving are 32-bit wide and data bits are accessed both on the rising edge and falling edge of the clock cycle.
D. The DIMMs used for 2-way interleaving are double the width and data bits are accessed both on the rising edge and falling edge of the clock cycle.

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