【简答题】实验中用Br2水在碱性介质中氧化Co2+,已知Eθ(Br2/Br-)=1.07 V,Eθ(Co3+/Co2+)=1.84 V,KSPθ(Co(OH)3)=1.6×10-44,KSPθ(Co(OH)2)=1.6×10-15;计算: (1)Eθ(Co(OH)3/Co(OH)2); (2)反应的平衡常数Kθ。
【单选题】The first few paragraphs describes the quarrel between the husband and wife as well as the relationship of the servant Sophia. Based on those paragraphs, which of the following is true of the quarrel?
A.
It was not the first time they quarrel
B.
They seldom quarreled and therefore both of them lost control
C.
The husband spoke softly as he never lost his self-control.
D.
The wife was forgiven and silent
【单选题】The first few paragraphs describe the quarrel between the husband and wife as well as the hardship of the servant Sophia. Based on those paragraphs, which of the following is true of the quarrel?
A.
It was not the first time they quarreled.
B.
They seldom quarreled and therefore both of them lost control.
C.
The husband spoke softly as he never lost his self-control.
D.
The wife was forgiven and silent.
【单选题】商业汇票的承兑期限由双方商定,最长不能超过( )。
【判断题】针对可能发生的危机事件,预测预警系统应发布预警级别等预警信息。预警级别依据突发事件可能造成的危害程度、紧急程度和发展势态,一般可划分为四级:Ⅰ级(特别重大)、Ⅱ(严重)、Ⅲ(较重)、Ⅳ(一般),依次用蓝色、黄色、橙色和红色表示。( )
【单选题】YT4543动力滑台液压系统,元件11上两节流阀的作用是( )。【图片】
【简答题】预言并解释在V(CO)6-,Cr(CO)6,Mn(CO)6+系列中,CO的伸缩振动频率的变化趋势。