题目内容

Fill in the blanks with the information from the text.1) We walked to school, ______ in the summer.2) One poem________in grade school survives in my mind.3)I did not read from a sense of superiority, or_______, or even learning.4)There is something in the American character...a certain_______that is suspicious of reading as anything more than a tool for advancement.5)There also arose...a kind of ______in the United States that sanction reading only if there was some point to it.6)For many journalists, reading... was most often _______as a series of problem to be addressed...7)After that, it became more difficult for one small group to lay an exclusive claim to books, to _______reading as their own.8)It was still in the _______ of the club chairs that we found one another...9)After that, it became more difficult for one small group to ______to books, to seize and hold reading as their own.10)There is something in the American character...a certain hale and heartiness that _______ reading as anything more than a tool for advancement.

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恒参信道与随参信道的定义及举例

原电池的反应为为:Zn +HCl=H2↑+ZnSO4该原电池电动势与下列因素无关的是( )。

A. ZnSO4溶液的浓度
B. 锌电极极板的面积
C. HCl 溶液的浓度
D. 温度

下列叙述中错误的是( )。

A. 电极电势的大小主要与构成电极的电对的本性、温度和浓度等因素有关
B. 标准电极电势规定温度为20℃,组成电极的有关离子浓度为1mol/L,气体压力为100kPa时所测得的电极电势
C. 非标准状态下电极的电极电势可通过能斯特方程计算得到
D. 标准氢电极的电极电势通常规定为0V

φθ(Fe2+/Fe)=-0.41V,φθ(Ag+/Ag)=0.80V,φθ(Fe3+/Fe2+)=0.77V。在标准状态下,电对Fe2+/Fe、Ag+/Ag、Fe3+/Fe2+中,最强的氧化剂和最强的还原剂分别是( )

Ag+、Fe2+
B. Ag+、Fe
C. Fe3+、Ag
D. Fe2+、Ag

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