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【简答题】
用极谱法分析测定某0．200 g试样中Zn2+的质量分数。在0．1mol?L-1NH3一NH4Cl溶液中加入0．05％的动物胶及0．5％Na2SO3除氧，测得试样的极限扩散电流为41．7uA。与试样作同样处理的标准zn2+的质量及波高如下。计算试样中zn2+的质量分数。
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举一反三
【简答题】Dave was newly hired by our company , and he is a good choice for the position since he gained rich (1) experience when he was working for another company.(manager)
【单选题】Dave was newly hired by our company,and he is a good choice for the position since he gained rich experience when he was working for another company .
A.
manager
B.
managerial
【简答题】Dave was newly hired by our company,and he is a good choice for the position since he gained rich experience when he was working for another company.
【单选题】Dave was newly hired by our company, and he is a good choice for the position since he gained rich ______ experience when he was working for another company.
A.
practical
B.
social
C.
marketing
D.
managerial
【单选题】Dave was newly hired by our company, and he is a good choice for the position since he gained rich ____ experience when he was working for another company.
A.
imaginative
B.
imaginable
C.
managerial
D.
manageable
【单选题】稀缺性是指
A.
生产家具的木材太少 生产粮食的土地太少 B.
B.
生产粮食的土地太少
C.
可用的经济资源与人类的欲望相比总是显得不足
D.
生产力不发达造成了物品供给不足
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