识读A厂房屋顶平面图,7号轴线与9号轴线之间的排水管间距为()mm。
A. 6000
B. 8000
C. 10000
D. 12000
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识读A厂房GS-09支撑详图,本工程水平支撑所采用的圆钢直径为()。
A. 15
B. 20
C. 25
D. 30
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.
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