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.
若|x+y﹣5|+（xy﹣6）2=0，则x2+y2的值为（ ）
| A: 13 |
| B: 26 |
| C: 28 |
| D: 37 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5aSa5Liq6Z2e6LSf5pWw55u45Yqg77yM5ZKM5Li6MO+8jOi/meWHoOS4qumdnui0n+aVsOeahOWAvOmDveS4ujA8L3A+
- 答案：QQ==
PGRpdj7op6PvvJrnlLHpopjmhI/lvpfvvIx4K3k9Ne+8jHh5PTY8L2Rpdj48ZGl2PuWPr+W+l++8jHg9Mix5PTM8L2Rpdj48ZGl2PuKItDxpbWcgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8xMC83MS9yQkFDRTFNRWRRdndkNnpUQUFBQ0NHNTl4Zlk2NjMucG5nIiBkYXRhLWNrZS1zYXZlZC1zcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzEwLzcxL3JCQUNFMU1FZFF2d2Q2elRBQUFDQ0c1OXhmWTY2My5wbmciIHdpZHRoPSI3OCIgaGVpZ2h0PSIyMSI+PC9kaXY+
本课配套习题挑战模式2/5
单选题
难度系数：
2.
已知a、b、c都是负数，且|x﹣a|+|y﹣b|+|z﹣c|=0，则xyz是（ ）
| A: 负数 |
| B: 非负数 |
| C: 正数 |
| D: 非正数 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5pyJ6ZmQ5Liq6Z2e6LSf5pWw55qE5ZKM5Li66Zu277yM6YKj5LmI5q+P5LiA5Liq5Yqg5pWw5Lmf5b+F5Li66Zu2PC9wPg==
- 提示2：PHA+fHjvuaNhfD0w77yMfHnvuaNifD0w77yMfHrvuaNjfD0wPC9wPg==
- 答案：QQ==
PGRpdj7op6PvvJrnlLHpopjmhI/lvpfvvIx8eO+5o2F8PTDvvIx8ee+5o2J8PTDvvIx8eu+5o2N8PTA8L2Rpdj48ZGl2Png9Ye+8jHk9Yu+8jHo9Y++8jHh5ej1hYmM8L2Rpdj48ZGl2PuKItSBh44CBYuOAgWPpg73mmK/otJ/mlbAg4oi0YWJjJmx0OzAg5omA5LuleHl65piv6LSf5pWwPGJyPjwvZGl2Pg==
本课配套习题挑战模式3/5
单选题
难度系数：
3.满足|a﹣b|+ab=1的非负整数（a，b）的个数是（ ）
| A: 1 |
| B: 2 |
| C: 3 |
| D: 4 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOmdnui0n+aVsOWMheaLrDDlkozmraPmlbA=
- 提示2：IHxh77mjYnw9MeaIlmFiPTE=
- 提示3：IOWtmOWcqO+8iDHvvIwx77yJ77yIMe+8jDDvvInvvIgw77yMMe+8iTPnp43mg4XlhrU=
- 答案：Qw==
PGRpdj7op6PvvJrmu6HotrN8YS1ifCthYj0x55qE6Z2e6LSf5pW05pWw77yIYe+8jGLvvInvvIw8YnI+57uP5YiG5p6Q6aKY5oSP5b6XfGEtYnw9MeaIlmFiPTHvvIw8YnI+4oi1Ye+8jGLmmK/pnZ7otJ/mlbDvvIw8YnI+4oi05a2Y5Zyo77yIMe+8jDHvvInvvIgx77yMMO+8ie+8iDDvvIwx77yJM+enjeaDheWGtTwvZGl2Pg==
本课配套习题挑战模式4/5
单选题
难度系数：
4.设a、b是有理数，且|a|+|b|≠0，那么下面命题正确的是（ ）
| A: a，b都不为零 |
| B: a，b不都为零 |
| C: a，b至少有一个为0 |
| D: a，b之和为零 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOS7u+S9leaVsOeahOe7neWvueWAvOS4gOWumuaYr+mdnui0n+aVsO+8jOS4pOS4qumdnui0n+aVsOS4reWPquimgeacieS4gOS4quS4jeetieS6jjDvvIzliJnkuKTkuKrmlbDnmoTlkozlsLHkuIDlrprkuI3nrYnkuo4w
- 答案：Qg==
PGRpdj7op6PvvJriiLV8YXziiaUw77yMfGJ84omlMDxicj7lj4jiiLV8YXwrfGJ84omgMO+8jDxicj7iiLRh77yMYuS4jemDveaYrzDvvI48YnI+6IulYe+8jGLkuK3vvIzlj6ropoHmnInkuIDkuKrkuI3nrYnkuo4w77yM5LiA5Liq5q2j5pWw5LiOMOeahOWSjOS4gOWumuWkp+S6jjA8L2Rpdj4=
本课配套习题挑战模式5/5
单选题
难度系数：
5.若a，b，c均为整数，且|a﹣b|2001+|c﹣a|2000=1，则|a﹣c|+|c﹣b|+|b﹣a|的值为（ ）
| A: 1 |
| B: 2 |
| C: 3 |
| D: 2001 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOe7neWvueWAvOeahOmdnui0n+aAp++8jOe7k+WQiOmimOaEj++8jHxh77mjYnw9Me+8jHxj77mjYXw9MOaIluiAhXxh77mjYnw9MO+8jHxj77mjYXw9MQ==
- 提示2：IOW9k3xh77mjYnw9Me+8jHxj77mjYXw9MOaXtu+8jGM9Ye+8jGE9YsKxMe+8jOS7o+WFpeWMlueugOW+lzI=
- 提示3：IOW9k3xh77mjYnw9MO+8jHxj77mjYXw9MeaXtu+8jGI9Ye+8jGM9YcKxMe+8jOS7o+WFpeWMlueugOW+lzI=
- 答案：Qg==
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
