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.用大小相同的小三角形摆成如图所示的图案，按照这样的规律摆放，则第n个图案中共有小三角形的个数是（ ）. 
| A: 3n+4 |
| B: 2n+4 |
| C: 3n-4 |
| D: 3n+2 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOinguWvn+WbvuW9ouWPr+efpe+8jOesrDHkuKrlm77lvaLlhbHmnInkuInop5LlvaI35Liq77yM5YiZ5pyJ77yIMSw377yJ77yb56ysMuS4quWbvuW9ouWFseacieS4ieinkuW9ojEw5Liq77yM5YiZ5pyJ77yIMu+8jDEw77yJ77yb56ysM+S4quWbvuW9ouWFseacieS4ieinkuW9ojEz5Liq77yM5YiZ5pyJ77yIMywxM++8ie+8m+esrDTkuKrlm77lvaLlhbHmnInkuInop5LlvaIxNuS4qu+8jOWImeacie+8iDQsMTbvvInvvJvigKbvvJvlj6/orr55PWtuK2LvvIzku6PlhaXvvIgxLDfvvInjgIHvvIgyLDEw77yJ5Y2z5Y+v44CC
- 答案：QQ==
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
本课配套习题挑战模式2/5
单选题
难度系数：
2.按如下规律摆放三角形：
则第（n）堆三角形的个数为（ ）.
则第（n）堆三角形的个数为（ ）. | A: 3n-2 |
| B: 2n+3 |
| C: 3n+2 |
| D: 2n-3 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOinguWvn+WbvuW9ouWPr+efpe+8jOesrDHkuKrlm77lvaLlhbHmnInkuInop5LlvaI15Liq77yM5YiZ5pyJ77yIMSw177yJ77yb56ysMuS4quWbvuW9ouWFseacieS4ieinkuW9ojjkuKrvvIzliJnmnInvvIgy77yMOO+8ie+8m+esrDPkuKrlm77lvaLlhbHmnInkuInop5LlvaIxMeS4qu+8jOWImeacie+8iDMsMTHvvInvvJvigKblj6/orr55PWtuK2LvvIzku6PlhaXvvIgxLDXvvInjgIHvvIgyLDjvvInljbPlj6/jgII=
- 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.下列图案都有若干个全等的等边三角形按一定的规律摆放而成，依此规律，则第10个图中等边三角形的个数为（ ）
| A: 28 |
| B: 32 |
| C: 36 |
| D: 40 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOinguWvn+WbvuW9ouWPr+efpe+8jOesrDHkuKrlm77lvaLlhbHmnInkuInop5LlvaI05Liq77yM5YiZ5pyJ77yIMSw077yJ77yb56ysMuS4quWbvuW9ouWFseacieS4ieinkuW9ojjkuKrvvIzliJnmnInvvIgy77yMOO+8ie+8m+esrDPkuKrlm77lvaLlhbHmnInkuInop5LlvaIxMuS4qu+8jOWImeacie+8iDMsMTLvvInvvJvnrKw05Liq5Zu+5b2i5YWx5pyJ5LiJ6KeS5b2iMTbkuKrvvIzliJnmnInvvIg0LDE277yJ77yb4oCm5Y+v6K6+eT1rbiti77yM5Luj5YWl77yIMSw077yJ44CB77yIMiw477yJ5Y2z5Y+v44CC
- 答案：RA==
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
本课配套习题挑战模式4/5
单选题
难度系数：
4.按如下规律摆放五角星：
按上面的规律继续摆放，其中恰好含有2014个五角星的图案是第（）个。
按上面的规律继续摆放，其中恰好含有2014个五角星的图案是第（）个。 | A: 670 |
| B: 671 |
| C: 672 |
| D: 673 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOinguWvn+WbvuW9ouWPr+efpe+8jOesrDHkuKrlm77lvaLlhbHmnInkuInop5LlvaI05Liq77yM5YiZ5pyJ77yIMSw077yJ77yb56ysMuS4quWbvuW9ouWFseacieS4ieinkuW9ojfkuKrvvIzliJnmnInvvIgy77yMN++8ie+8m+esrDPkuKrlm77lvaLlhbHmnInkuInop5LlvaIxMOS4qu+8jOWImeacie+8iDMsMTDvvInvvJvnrKw05Liq5Zu+5b2i5YWx5pyJ5LiJ6KeS5b2iMTPkuKrvvIzliJnmnInvvIg0LDEz77yJ77yb4oCm5Y+v6K6+eT1rbiti77yM5Luj5YWl77yIMSw077yJ44CB77yIMiw377yJ6Kej5b6Xa+OAgWLnmoTlgLzvvIzku6R5PTIwMTTvvIzop6Plvpdu5YC85Y2z5Y+v44CC
- 答案：Qg==
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
本课配套习题挑战模式5/5
单选题
难度系数：
5.如图，是一组按照某种规律摆放而成的图案，则图6中三角形的个数是（ ）
| A: 18 |
| B: 19 |
| C: 20 |
| D: 21 |
一次做对，真牛！
+5奖励规则>
- 提示1：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
- 提示2：IOS7pG49Nu+8jOino+W+l3nlgLzljbPlj6/jgII=
- 答案：Qw==
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
