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.在四边形ABCD中，从①AB∥CD；②AB=CD；③BC∥AD；④BC=AD中任选两个使四边形ABCD为平行四边形的选法有（ ）
| A: 3 |
| B: 4 |
| C: 5 |
| D: 6 |
一次做对，真牛！
+5奖励规则>
- 提示1：5o2u5bmz6KGM5Zub6L655b2i55qE5Yik5a6a77ya4pGg5Lik57uE5a+56L655YiG5Yir5bmz6KGM55qE5Zub6L655b2i5piv5bmz6KGM5Zub6L655b2i77ybPGJyPuKRoeS4pOe7hOWvuei+ueWIhuWIq+ebuOetieeahOWbm+i+ueW9ouaYr+W5s+ihjOWbm+i+ueW9ou+8mzxicj7ikaLkuIDnu4Tlr7novrnlubPooYzkuJTnm7jnrYnnmoTlm5vovrnlvaLmmK/lubPooYzlm5vovrnlvaLvvI48YnI+5qC55o2u5bmz6KGM5Zub6L655b2i55qE5Yik5a6a6L+b6KGM6YCQ5LiA6aqM6K+B5Y2z5Y+v77yO
- 答案：Qg==
6Kej77ya5Lu75Y+W5YW25Lit5Lik5Liq77yM5Y+v5Lul5b6X5Ye64oCc5Zub6L655b2iQUJDROaYr+W5s+ihjOWbm+i+ueW9ouKAnei/meS4gOe7k+iuuueahOaDheWGteacie+8iDHvvInvvIgy77yJ77yb77yIM++8ie+8iDTvvInvvJvvvIgx77yJ77yIM++8ie+8m++8iDLvvInvvIg077yJ5YWx5Zub56eN77yO5pWF6YCJQu+8jg==
本课配套习题挑战模式2/5
单选题
难度系数：
2.下列结论正确的是（ ）
| A: 对角线相等且一组对角相等的四边形是平行四边形 |
| B: 一边长为5cm，两条对角线长分别是4cm和6cm的四边形是平行四边形 |
| C: 一组对边平行且一组对角相等的四边形是平行四边形 |
| D: 对角线相等的四边形是平行四边形 |
一次做对，真牛！
+5奖励规则>
- 提示1：5qC55o2u5bmz6KGM5Zub6L655b2i55qE5ZCE56eN5Yik5a6a5pa55rOV5YiG5p6Q5Y2z5Y+v77yO
- 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.下面给出了四边形ABCD中∠A、∠B、∠C、∠D的度数之比，其中能判定四边形ABCD是平行四边形的是（ ）
| A: 3：4：5：6 |
| B: 4：4：5：5 |
| C: 4：5：4：5 |
| D: 4：5：5：4 |
一次做对，真牛！
+5奖励规则>
- 提示1：55Sx5LqO5bmz6KGM5Zub6L655b2i55qE5Lik57uE5a+56KeS5YiG5Yir55u4562J77yM5pWF5Y+q5pyJQ+iDveWIpOWumuaYr+W5s+ihjOWbm+i+ueW9ou+8juWFtuWug+S4ieS4qumAiemhueS4jeiDvea7oei2s+S4pOe7hOWvueinkuebuOetie+8jOaVheS4jeiDveWIpOWumu+8jg==
- 答案：Qw==
6Kej77ya5qC55o2u5bmz6KGM5Zub6L655b2i55qE5Lik57uE5a+56KeS5YiG5Yir55u4562J77yM5Y+v55+lQ+ato+ehru+8jjxicj7mlYXpgInvvJpD77yO
本课配套习题挑战模式4/5
单选题
难度系数：
4.平面内，A、B、C三点不在同一条直线上，以A、B、C为顶点的平行四边形有（ ）
| A: 1个 |
| B: 2个 |
| C: 3个 |
| D: 4个 |
一次做对，真牛！
+5奖励规则>
- 提示1：5LiN5Zyo5ZCM5LiA55u057q/5LiK55qE5LiJ54K55Li6QeOAgULjgIFD77yM6L+e5o6lQULjgIFCQ+OAgUNB77yM5YiG5Yir5Lul5YW25Lit5LiA5p2h57q/5q615Li65a+56KeS57q/77yM5Y+m5Lik6L655Li65bmz6KGM5Zub6L655b2i55qE6L6577yM5Y+v5p6E5oiQ5LiJ5Liq5LiN5ZCM55qE5bmz6KGM5Zub6L655b2i77yO
- 答案：Qw==
6Kej77ya5bey55+l5LiJ54K55Li6QeOAgULjgIFD77yM6L+e5o6lQULjgIFCQ+OAgUNB77yMPGJyPuWIhuWIq+S7pUFC44CBQkPjgIFDQeS4uuW5s+ihjOWbm+i+ueW9oueahOWvueinkue6v++8jOWPpuWkluS4pOi+ueS4uui+ue+8jDxicj7lj6/mnoTmiJDnmoTlubPooYzlm5vovrnlvaLmnInkuInkuKrvvJomIzk2NDk7QUNCRO+8jCYjOTY0OTtBQ0VC77yMJiM5NjQ5O0FCQ0bvvI48YnI+5pWF6YCJ77yaQ++8jjxicj48aW1nIHdpZHRoPTE1NyBoZWlnaHQ9MTA2IHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvNkUvMTcvckJBQ0oxVV9TNG5pdTFrNUFBQU5tOTA2MXQ4NDUzLnBuZyI+
本课配套习题挑战模式5/5
单选题
难度系数：
5.
在下列条件中，不能确定四边形ABCD为平行四边形的是（ ）
| A: ∠A=∠C，∠B=∠D |
| B: ∠A=∠B=∠C=90° |
| C: ∠A+∠B=180°，∠B+∠C=180° |
| D: ∠A+∠B=180°，∠C+∠D=180° |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5qC55o2u5bmz6KGM5Zub6L655b2i55qE5aSa56eN5Yik5a6a5pa55rOV77yM5YiG5Yir5YiG5p6QQeOAgULjgIFD44CBROmAiemhueaYr+WQpuWPr+S7peivgeaYjuWbm+i+ueW9okFCQ0TkuLrlubPooYzlm5vovrnlvaLvvIzljbPlj6/op6PpopjvvI48YnI+PC9wPg==
- 答案：RA==
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
