中学生网络课堂
本课配套习题挑战模式2/5
单选题
难度系数：
2.己知一个表面积为12dm2的正方体，则这个正方体的棱长为（ ）
| A: 1dm |
B:  |
C:  |
| D: 3dm |
一次做对，真牛！
+5奖励规则>
- 提示1：5qC55o2u5q2j5pa55L2T55qE6KGo6Z2i56ev5YWs5byP77yacz02YTxzdXA+Mjwvc3VwPu+8jOino+etlOWNs+WPr++8jg==
- 答案：Qg==
6Kej77ya5Zug5Li65q2j5pa55L2T55qE6KGo6Z2i56ev5YWs5byP77yacz02YTxzdXA+Mjwvc3VwPu+8jDxicj7lj6/lvpfvvJo2YTxzdXA+Mjwvc3VwPj0xMu+8jDxicj7op6PlvpfvvJphPTxpbWcgd2lkdGg9MTkgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvQzcvOEYvckJBQ0UxV2JlMlRDb2Jua0FBQUJlMzFfV2VFMjUzLnBuZyI+77yOPGJyPuaVhemAiULvvI4=
本课配套习题挑战模式3/5
单选题
难度系数：
3.
的算数平方根是（ ）
| A:
|
| B: 2 |
| C: ±2 |
| D: ± |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+6aaW5YWI5qC55o2u566X5pyv5bmz5pa55qC555qE5a6a5LmJ5YyW566APGltZyBkYXRhLWNrZS1zYXZlZC1zcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzkxLzk2L3JCQUNKbFdiZTJuakJ1cGFBQUFCbWQzTzFUczUzMS5wbmciIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvOTEvOTYvckJBQ0psV2JlMm5qQnVwYUFBQUJtZDNPMVRzNTMxLnBuZyIgd2lkdGg9IjI1IiBoZWlnaHQ9IjIxIj7vvIznhLblkI7moLnmja7nrpfmlbDlubPmlrnmoLnnmoTlrprkuYnljbPlj6/lvpflh7rnu5PmnpzvvI48YnI+PC9wPg==
- 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.下列计算正确的是（ ）
A:  |
B:  |
C:  |
D:  |
一次做对，真牛！
+5奖励规则>
- 提示1：5qC55o2u566X5pyv5bmz5pa55qC555qE5a6a5LmJ6K6h566X6Kej562U5Y2z5Y+v77yO
- 答案：Qg==
6Kej77yaPGltZyB3aWR0aD02MiBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC9DNy84Ri9yQkFDRTFXYmU0WHc0X3hqQUFBQl9Tb1dickU0NDEucG5nIj7mraPnoa7vvIzlhbbku5bplJnor68=
本课配套习题挑战模式5/5
单选题
难度系数：
5.若
=a=a，则a的值为（ ）
=a=a，则a的值为（ ） | A: 1 |
| B: -1 |
| C: 0或1 |
| D: ±1 |
一次做对，真牛！
+5奖励规则>
- 提示1：5qC55o2u566X5pyv5bmz5pa55qC555qE5a6a5LmJ5Y+v55+l77yM566X5pyv5bmz5pa55qC5562J5LqO5a6D5pys6Lqr55qE5pWw5pivMOaIljHvvI4=
- 答案：Qw==
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
