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【单选题】
在0.05mol/L的HCN中，若有0.01%的HCN电离了，则HCN的解离常数Ka为（）。A.
5×10-8
B.
5×10-10
C.
5×10-6
D.
2.5×10-7
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【单选题】42 The surey was focused on
A.
the liing conditions of older physicians in the U. S.
B.
the career plans of older physicians in the U. S.
C.
the retirement plans of older physicians in the U. S.
D.
the achieements of older physicians in the U. S.
【单选题】What did young people in like to wear? [ ]
A.
the 1990'
B.
1990s
C.
the 1990
D.
the 1990s
【简答题】A)The 1940s. B)The 1950s. C)The 1970s D)The 1980s.
【单选题】The decline of the Greek aristocracy' s power in the sixth century B.C.was the result of______.
A.
the conflicts between the peasants and the landed aristocrats
B.
the foreign residents
C.
slaves
D.
the newly emerging middle class in the sixth century
【单选题】The figure given below shows a shift in the production-possibility curve of a country from AB to AC. Here, S 1 and C 1 are the initial production and consumption points respectively. S 2 and C 2 , on ...
A.
B.
C.
D.
D
【多选题】承包商对工程项目管理的特点包括( )。
A.
以委托合同为根本要求
B.
管理直接作用于工程项目实体
C.
项目建设风险的最后控制阶段
D.
管理的内容视委托情况而变动
E.
管理过程中资金投入相对巨大
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