中学生网络课堂本课配套习题挑战模式1/5
单选题
难度系数：
1.已知（x-y+3）2+
=0，则x+y的值为（ ）
=0，则x+y的值为（ ） | A: 0 |
| B: -1 |
| C: 1 |
| D: 5 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOWFiOagueaNrumdnui0n+aVsOeahOaAp+i0qOWIl+WHuuWFs+S6jnjjgIF555qE5pa556iL57uE77yM5rGC5Ye6eOOAgXnnmoTlgLzljbPlj68u
- 答案：Qw==
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
本课配套习题挑战模式2/5
单选题
难度系数：
2.已知
是二元一次方程组
的解，则2m-n的算术平方根为（ ）
是二元一次方程组 的解，则2m-n的算术平方根为（ ） | A: ±2 |
B:  |
| C: 2 |
| D: 4 |
一次做对，真牛！
+5奖励规则>
- 提示1：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
- 答案：Qw==
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
本课配套习题挑战模式3/5
单选题
难度系数：
3.已知方程组
的解为，则2a-3b的值为（ ）
的解为，则2a-3b的值为（ ）| A: 4 |
| B: 6 |
| C: -6 |
| D: -4 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOaKiuWOn+aWueeoi+e7hOeahOino+S7o+WFpeaWueeoi+e7hO+8jOaxguWHumHvvIxi55qE5YC877yM5YaN5Luj5YWl5omA5rGC5Luj5pWw5byP5Y2z5Y+vLg==
- 答案：Qg==
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
本课配套习题挑战模式4/5
单选题
难度系数：
4.如果
，其中xyz≠0，那么x：y：z=（ ）
，其中xyz≠0，那么x：y：z=（ ）| A: 1：2：3 |
| B: 2：3：4 |
| C: 2：3：1 |
| D: 3：2：1 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOeQhuino+a4healmumimOaEj++8jOi/kOeUqOS4ieWFg+S4gOasoeaWueeoi+e7hOeahOefpeivhu+8jOaKinjvvIx555SoeuihqOekuuWHuuadpe+8jOS7o+WFpeS7o+aVsOW8j+axguWAvC4=
- 答案：Qw==
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
本课配套习题挑战模式5/5
单选题
难度系数：
5.如果方程组
的解相同，则a+b的值为（ ）
的解相同，则a+b的值为（ ）| A: -1 |
| B: 2 |
| C: 1 |
| D: 0 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOaKijxpbWcgd2lkdGg9NDQgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvQTMvMUUvckJBQ0UxT1lJYktnVlBiZEFBQUNObm4xaWVnODkwLnBuZyI+5Luj5YWl5pa556iL57uEPGltZyB3aWR0aD04MiBoZWlnaHQ9NjIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC82Ni9GQS9yQkFDRkZPWUliS0M4UjhOQUFBREwxLTlOa2M2MzYucG5nIj7vvIzljbPlj6/lvpfliLDkuIDkuKrlhbPkuo5h77yMYueahOaWueeoi+e7hO+8jOWNs+WPr+axguinoy4=
- 答案：Qw==
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
