问题
选择题
No one can________how the election will turn out, as there are many unknown facts. [ ]
A. protect
B. prepare
C. prevent
D. predict
答案
答案：D
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No one can________how the election will turn out, as there are many unknown facts. [ ]
A. protect
B. prepare
C. prevent
D. predict
答案：D
将质量分数为0.052的NaOH溶液1L（密度为1.06g·cm-3）用铂电极电解，当溶液中NaOH的质量分数改变了0.010时停止电解，则这时溶液中应符合的关系是
| NaOH的质量分数 | 阴极析出的物质的质量/g | 阳极析出的物质的质量/g | |
| A | 0.062 | 19 | 152 |
| B | 0.062 | 152 | 19 |
| C | 0.042 | 1.2 | 9.4 |
| D | 0.042 | 9.4 | 1.2 |