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.如图所示. 在▱ABCD中，AE⊥BC，CF⊥AD，DN=BM. 连接EF与MN，则EF与MN的关系为（ ）。
| A: EF与MN互相平行 |
| B: EF与MN互相垂直 |
| C: EF与MN互相平分 |
| D: 无法确定 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOeUsemimOS4readoeS7tuWPr+W+l1J04pazQUJF4omMUnTilrNDREbvvIzku47ogIzlnKhSdOKWs0FCReS4jlJ04pazQ0RG5Lit77yM55Sx5LqORE49Qk3vvIzmiYDku6Xlj6/lvpfliLBNRT1GTu+8jOi/m+iAjOWGjeeUseKWs01BRuKJjOKWs05DRe+8jOW+l+WHuk1GPU5F77yM5Y2z5Zub6L655b2iRU5GTeaYr+W5s+ihjOWbm+i+ueW9ou+8jOS7juiAjOWvueinkue6v0VG5LiOTU7kupLnm7jlubPliIYu
- 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.已知如图，平行四边形ABCD的对角线AC和BD交于O，E、F分别为OB、OD的中点，过O任作一直线分别交AB、CD于G、H，连接GF、EH，则GF与EH的关系是（ ）。
A: GF  EH |
| B: GF∥EH |
| C: GF＝EH |
| D: 无法确定 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOi/nue7k0dF44CBRkjvvIzliKnnlKjlr7nop5Lnur/kupLnm7jlubPliIbor4HmmI7lm5vovrnlvaJHRUhG5Li65bmz6KGM5Zub6L655b2i77yM5Yip55So5bmz6KGM5Zub6L655b2i5oCn6LSo5Y+v5b6X44CC
- 答案：QQ==
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
本课配套习题挑战模式3/5
单选题
难度系数：
3.如图所示，分别以△ABC三边长为边在同一方向作三个等边三角形
，连接CD、EF，分析CD与EF的关系为（ ）。
，连接CD、EF，分析CD与EF的关系为（ ）。 | A: EF与CD互相平分 |
| B: EF与CD互相平行 |
| C: EF与CD相等 |
| D: 无法确定 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOWPr+S7pei/nuaOpURG44CBREXvvIzor4HmmI7lm5vovrnlvaJERkNF5piv5bmz6KGM5Zub6L655b2i77yM5Y2z5Y+v5b6X6Kej44CC
- 答案：QQ==
6Kej77ya6L+e57uTREXjgIFERuOAgUFG5piT55+lQUQ9QUI9QkQ8YnI+PGltZyB3aWR0aD0xOTQgaGVpZ2h0PTE4MSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwL0E1LzFFL3JCQUNFMU9aUW9yaU9WeXdBQUFVaUdKXzUxTTQyLmpwZWciPjxicj48aW1nIHdpZHRoPTI2OCBoZWlnaHQ9NjIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC82OC9GNS9yQkFDRkZPWlFvclRvUVM4QUFBR2JBTkpPZkkzNDcucG5nIj48YnI+5Y+IQUU9QUPvvIxBRD1BQjxicj7iiKBEQUU9NjDCsO+8jeKIoEVBQj3iiKBCQUM8YnI+PGltZyB3aWR0aD0xMTAgaGVpZ2h0PTQwIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvQTUvMUUvckJBQ0UxT1pRb3JEOThJNkFBQURiQmRRZ0tnNzgwLnBuZyI+PGJyPjxpbWcgd2lkdGg9MTQgaGVpZ2h0PTE0IHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvNjgvRjUvckJBQ0ZGT1pRb1dpbzhJOEFBQUF3aXpoektBMDk0LnBuZyI+5Zub6L655b2iREVDRuaYr+W5s+ihjOWbm+i+ueW9ojxicj7iiLRDROS4jkVG5LqS55u45bmz5YiGPGJyPuaVhemAiUHjgII=
本课配套习题挑战模式4/5
单选题
难度系数：
4.如图，
中，D在AB上，E在AC的延长线上，BD=CE连结DE，交BC于F，∠BAC外角的平分线交BC的延长线于G，且AG//DE，则BF与FC的数量关系是（）。
中，D在AB上，E在AC的延长线上，BD=CE连结DE，交BC于F，∠BAC外角的平分线交BC的延长线于G，且AG//DE，则BF与FC的数量关系是（）。 A: BF＝ FC |
| B: BF＝FC |
| C: BF≠FC |
| D: 无法确定 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOi/h+eCuUPkvZxDTS8vQULkuqREReS6jueCuU3vvIzlj6/ku6Xor4HmmI5CRD1DTe+8jOeEtuWQjuWGjeWIqeeUqOW5s+ihjOWbm+i+ueW9oueahOaAp+i0qOW+l+WIsEJGPUNG
- 答案：Qg==
6Kej77ya6L+H54K5Q+S9nENNLy9BQuS6pEJF5LqO54K5Te+8jOi/nuaOpUJN44CBQ0TvvIzliJniiKBDTUU94oigQURFPGJyPjxpbWcgd2lkdGg9MjUxIGhlaWdodD05OCBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwL0E1LzFFL3JCQUNFMU9aUW9fekdCcUtBQUFRU1hVejhfazc3LmpwZWciPjxicj48aW1nIHdpZHRoPTE2MSBoZWlnaHQ9MTIyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvNjgvRjUvckJBQ0ZGT1pRb19CbUNXekFBQUlreXVmd0Y4MDk4LnBuZyI+PGJyPuKItOWbm+i+ueW9okJNQ0TkuLrlubPooYzlm5vovrnlvaI8YnI+4oi0QkY9Q0Y8YnI+5pWF6YCJQuOAgg==
本课配套习题挑战模式5/5
单选题
难度系数：
5.如图，在四边形ABCD中，AD=BC，E、F分别是CD、AB的中点，直线EF分别交BC、AD延长线于S、T，则∠ATF与∠BSF的数量关系是（ ）
A: ∠ATF＝ ∠BSF |
| B: ∠ATF＝∠BSF |
| C: ∠ATF＝2∠BSF |
| D: ∠ATF≠∠BSF |
一次做对，真牛！
+5奖励规则>
- 提示1：IOeUseS6juKIoEFURuWSjOKIoEJTRuS4jeWcqOWQjOS4gOS4quS4ieinkuW9ouWGhe+8jOaJgOS7pemcgOimgeaKiuS4pOS4quinkui9rOenu++8jOi/h+eCuUblgZpHSDxpbWcgd2lkdGg9MjEgaGVpZ2h0PTIzIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvNjgvRjUvckJBQ0ZGT1pRcFRRMzVOc0FBQURURmdnWDFzODMuanBlZyI+Q0TvvIzkuJRGRz1GSO+8jOi/nuaOpURH44CBQ0jjgIFBR+OAgUJILuWImeWbm+i+ueW9okRHSEPlkozlm5vovrnlvaJBR0JI5piv5bmz6KGM5Zub6L655b2iLg==
- 答案：Qg==
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
