1/5单选题
难度：
1.若代数式
有意义，则实数x的取值范围是（ ）
有意义，则实数x的取值范围是（ ）| |
| A | x≠1 |
| B | x≥0 |
| C | x＞0 |
| D | x≥0且x≠1 |
- 提示1：
- IOWIhuavjeS4jeS4ujA=
- 提示2：
- IOagueWPt+S4i+eahOaVsOmdnui0nw==
正确答案：RA==
6Kej77ya4oi15YiG5q+N5LiN6IO95Li6MO+8jOKItHgtMeKJoDDvvIzljbN44omgMTxicj7iiLXmoLnlj7fkuIvnmoTmlbDpnZ7otJ/iiLR44omlMDxicj7iiLR44omlMOS4lHjiiaAxPGJyPuWNs+mAiUQ8YnI+
2/5单选题
难度：
2.已知
，则a的取值范围是（ ）
，则a的取值范围是（ ） | A | a≤0 |
| B | a＜0 |
| C | 0＜a≤1 |
| D | a＞0 |
- 提示1：
- IOmAmui/hzxpbWcgd2lkdGg9OTIgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvNjgvOTcvckJBQ0ZGT1pLQXF6UTAweEFBQUNRU1pWMC1zMDIzLnBuZyI+5Ye6YeKJpTDvvIziiLXlnKjliIbmr43kuIrvvIzlj6/lvpdh77yeMA==
- 提示2：
- IDxpbWcgd2lkdGg9NDAgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvQTQvQkYvckJBQ0UxT1pLQXJ3MVR4QUFBQUJseWtZSVYwNzI0LnBuZyI+5pyJ5oSP5LmJ77yM4oi0YeKJpDE=
正确答案：Qw==
6Kej77ya6YCa6L+HPGltZyB3aWR0aD05MiBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC82OC85Ny9yQkFDRkZPWktBcXpRMDB4QUFBQ1FTWlYwLXMwMjMucG5nIj7lh7ph4omlMO+8jOKIteWcqOWIhuavjeS4iu+8jOWPr+W+l2HvvJ4wPGJyPjxpbWcgd2lkdGg9NDAgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvQTQvQkYvckJBQ0UxT1pLQXJ3MVR4QUFBQUJseWtZSVYwNzI0LnBuZyI+5pyJ5oSP5LmJ77yM4oi0YeKJpDE8YnI+4oi0MO+8nGHiiaQxPGJyPg==
3/5单选题
难度：
3.当m＜0时，化简
的结果是（ ）
的结果是（ ） | A | -1 |
| B | 1 |
| C | m |
| D | –m |
- 提示1：
- IDxpbWcgd2lkdGg9MTM3IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwL0E0L0JGL3JCQUNFMU9aS0E2QjZwR0pBQUFDWkVlcld2MDU2Ny5wbmciPg==
正确答案：QQ==
6Kej77yaPGltZyB3aWR0aD0xMzcgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvQTQvQkYvckJBQ0UxT1pLQTZCNnBHSkFBQUNaRWVyV3YwNTY3LnBuZyI+PGJyPuKItDxpbWcgd2lkdGg9NTMgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvNjgvOTcvckJBQ0ZGT1pLQTZDalRLUEFBQUJzd1hiaXFNMjU1LnBuZyI+PGJyPumAiUE8YnI+
4/5单选题
难度：
4.化简二次根式a
的结果是（ ）
的结果是（ ）| A |  |
| B |  |
| C |  |
| D |  |
- 提示1：
- IOWIpOaWreWHumErMuKJpDDvvIzlj6/lvpdh4omkLTI=
- 提示2：
- IGE8aW1nIHdpZHRoPTc2IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwL0E0L0JGL3JCQUNFMU9aS0JPUUdJczRBQUFDalNCMGk0QTA0MC5wbmciPg==
正确答案：Qg==
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
5/5单选题
难度：
5.若ab≠0，则等式−
成立的条件是（ ）
成立的条件是（ ） | A | a＞0，b＞0 |
| B | a＞0，b＜0 |
| C | a＜0，b＞0 |
| D | a＜0，b＜0 |
- 提示1：
- 4oi1DQphYuKJoDDvvIzku47nrYnlvI/lt6bovrnliKTmlq3lh7omIzg3MjI7PGltZyB3aWR0aD01OSBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC9BNC9CRi9yQkFDRTFPWktCZnpvOUduQUFBQ01DaG9CSWMyODEucG5nIj4=
- 提示2：
- IOetieW8j+WPs+i+uTxpbWcgd2lkdGg9NzAgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvNjgvOTcvckJBQ0ZGT1pLQmpUT1lTSkFBQUNUaXF4YUc4MDIyLnBuZyI+
- 提示3：
- IOKItGLvvJww77yMYe+8njA=
正确答案：Qg==
6Kej77ya4oi1IGFi4omgMO+8jOS7juetieW8j+W3pui+ueWIpOaWreWHuiYjODcyMjs8aW1nIHdpZHRoPTU5IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwL0E0L0JGL3JCQUNFMU9aS0Jmem85R25BQUFDTUNob0JJYzI4MS5wbmciPjxicj7iiLTnrYnlvI/lj7Povrk8aW1nIHdpZHRoPTcwIGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzY4Lzk3L3JCQUNGRk9aS0JqVE9ZU0pBQUFDVGlxeGFHODAyMi5wbmciPjxicj7iiLRi77ycMO+8jGHvvJ4w