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【单选题】
已知 25°C 时电极反应 + 8H + + 5e==MnO 2 + 4H 2 O 的 j θ =1.51V 。若此时 c(H + ) 由 1mol· 减小到 10 -4 mol· ,则该电对的电极电势变化值为 ( )A.
上升 0.38V
B.
上升 0.047V
C.
下降 0.38V
D.
下降 0.047V
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举一反三
【单选题】
A.
They could break people's legs
B.
They could sometimes terrify adults
C.
They could fly against a strong wind
D.
They could knock people unconscious
【简答题】Questions 12 to 15 are based on the conversation you have just heard. 12.A) He is the only boy in his family. B) He becomes tearful in wind. C) He has stopped terrible faces. D) He is his teach...
【简答题】经营杠杆能够扩大市场和生产等不确定性因素对利润变动的影响。（ ）
【简答题】Questions 12 to 15 are based on the conversation you have just heard. 12. A) He becomes tearful in wind. B) He is the only boy in his family. C) He is his teacher’s favorite student. D) He has stopped...
【简答题】Conversation Two Questions 12 to 15 are based on the conversation you have just heard. 12. A) He becomes tearful in wind. B) He is the only boy in his family. C) He is his teacher’s favorite student. ...
【单选题】关于肩胛骨的叙述,错误的是
A.
为三角形的扁骨
B.
后面由肩胛冈分为冈上窝和冈下窝
C.
下角平对第7肋(或第7肋间隙)
D.
喙突的外侧有肩胛切迹
E.
上角平对第2肋上缘
【单选题】
A.
They could break pp ’ s legs
B.
They could sometimes terrify adults
C.
They could fly against a strong wind
D.
They could knock pp unconscious
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