1/5单选题
难度：
1.
下列给出的对象中，能组成集合的是（）
| A | 一切很大的数 |
| B | 高考中所有的难题 |
| C | 美丽的小女孩 |
| D | 方程x2－1＝0的实数根 |
- 提示1：
- PHA+6YCJ6aG5Qe+8jELvvIxD5Lit55qE5a+56LGh6YO95rKh5pyJ5piO56Gu55qE5Yik5pat5qCH5YeG77yM5LiN5ruh6Laz6ZuG5ZCI5Lit5YWD57Sg55qE56Gu5a6a5oCnPC9wPg==
正确答案：RA==
PHA+6Kej77ya6YCJ6aG5Qe+8jELvvIxD5Lit55qE5a+56LGh6YO95rKh5pyJ5piO56Gu55qE5Yik5pat5qCH5YeG77yM5LiN5ruh6Laz6ZuG5ZCI5Lit5YWD57Sg55qE56Gu5a6a5oCn77yM5omA5Lul6YCJ5oupRC48L3A+
2/5单选题
难度：
2.
下面几个命题中不正确的命题是（ ）
| A | 集合N*中最小的数是1 |
| B | 若－a∉N*，则a∈N* |
| C | √2 是无理数！ |
| D | 集合N中最小的数是0 |
- 提示1：
- 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
正确答案：Qg==
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
3/5单选题
难度：
3.
已知①
R ②
∈Q ③0＝{0} ④0∉N⑤π∈Q ⑥－3∈Z.
正确的个数为 （）
| A | 1 |
| B | 2 |
| C | 3 |
| D | 4 |
- 提示1：
- PHA+4pGi4pGj4pGk5piv6ZSZ6K+v55qEPC9wPg==
正确答案：Qw==
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
4/5单选题
难度：
4.
已知集合A含有两个元素a－3和2a－1，若－3∈A，则实数a的值是（）
| A | 0 |
| B |
|
| C | 0或 |
| D | 2 |
- 提示1：
- PHA+5Zug5Li677yNM+KIiDxpPkE8L2k+77yM5omA5Lul77yNM++8nTxpPmE8L2k+77yNM+aIlu+8jTPvvJ08aT4yYTwvaT7vvI0xLjwvcD4=
正确答案：Qw==
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
5/5单选题
难度：
5.已知集合A含有两个元素a－3和2a－1，若a∈A，实数a的值是（）
| A | 0 |
| B | 1 |
| C | 2 |
| D | 3 |
- 提示1：
- IOWboOS4ujxpPmE8L2k+4oiIPGk+QTwvaT7vvIzmiYDku6U8aT5hPC9pPu+8nTxpPmE8L2k+77yNM+aIljxpPmE8L2k+77ydMjxpPmE8L2k+77yNMS4=
正确答案：Qg==
6Kej77ya5b2TPGk+YTwvaT7vvJ08aT5hPC9pPu+8jTPml7bvvIzmnIkw77yd77yNM++8jOS4jeaIkOeriy4gPGJyPuW9kzxpPmE8L2k+77ydMjxpPmE8L2k+77yNMeaXtu+8jOaciTxpPmE8L2k+77ydMe+8jOatpOaXtjxpPkE8L2k+5Lit5pyJ5Lik5Liq5YWD57Sg77yNMu+8jDHvvIznrKblkIjpopjmhI8uIOe7vOS4iuefpTxpPmE8L2k+77ydMS4=