问题
单项选择题
在H2S的饱和溶液中，下列结论中错误的是（）。
A.溶液中H+浓度主要取决于第一级电离
B.溶液中S2-浓度最小，基本等于其第二级电离常数
C.溶液中
D.溶液中［H+］=2［S2-］
答案
参考答案：D
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在H2S的饱和溶液中，下列结论中错误的是（）。
A.溶液中H+浓度主要取决于第一级电离
B.溶液中S2-浓度最小，基本等于其第二级电离常数
C.溶液中
D.溶液中［H+］=2［S2-］
参考答案：D
| 根据对话内容，从方框中选出五个能填入空白处的最佳选项。 | |
B: Hello, Kate. I'd like to borrow your Chinese dictionary. I lost mine this afternoon. A: Sorry! 1_____________ Could you speak a little clearly and slowly? B: Yes. Could you lend me your Chinese dictionary? Mine is lost. A: Sure! When do you want it? B: 2_____________ A: But it is Sunday tomorrow. I won't go to school. B: 3_____________ A: But I'll go to Miss Wang's home tomorrow. Could you come in the afternoon? B: Certainly. 4_____________ A: 5_____________ I'll wait for you. B: Thank you. Bye. |