问题
选择题
As a businessman he was a success, but as a husband he was________failure, so their marriage ended
in________failure.[ ]
A. /; /
B. /; a
C. a; a
D. a; /
答案
答案：D
搜题请搜索小程序“爱下问搜题”
As a businessman he was a success, but as a husband he was________failure, so their marriage ended
in________failure.[ ]
A. /; /
B. /; a
C. a; a
D. a; /
答案：D
在标准状况下进行下列实验：甲、乙、丙各取100mL同浓度的盐酸，加入同一镁、铝合金，产生气体，测得有关数据列表如下：
| 实验序号 | 甲 | 乙 | 丙 |
| 合金质量 | 0.390g | 0.702g | 0.936g |
| 气体体积 | 448mL | 672mL | 672mL |
（1）盐酸的物质的量浓度
（2）合金中镁与铝的物质的量之比
（3）在实验甲反应后溶液中加入过量 0.
2mol·L-1的NaOH溶液，欲使生成的沉淀最少，至少应加入多少毫升0.2mol·L-1的NaOH溶液?