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.
菱形具有而平行四边形不具有的性质是（ ）
| A: 两组对边分别平行 |
| B: 两组对角分别相等 |
| C: 对角线互相平分 |
| D: 对角线互相垂直 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+6I+x5b2i55qE54m55q6K5oCn6LSo5Y+v55+l5a+56KeS57q/5LqS55u45Z6C55u077yOPGJyPjwvcD4=
- 答案：RA==
PHA+6Kej77yaQeOAgeS4jeato+ehru+8jOS4pOe7hOWvuei+ueWIhuWIq+W5s+ihjO+8mzxicj5C44CB5LiN5q2j56Gu77yM5Lik57uE5a+56KeS5YiG5Yir55u4562J77yM5Lik6ICF5Z2H5pyJ5q2k5oCn6LSo5q2j56Gu77yM77ybPGJyPkPjgIHkuI3mraPnoa7vvIzlr7nop5Lnur/kupLnm7jlubPliIbvvIzkuKTogIXlnYflhbfmnInmraTmgKfotKjvvJs8YnI+ROOAgeiPseW9oueahOWvueinkue6v+S6kuebuOWeguebtOS9huW5s+ihjOWbm+i+ueW9ouWNtOaXoOatpOaAp+i0qO+8jjxicj7mlYXpgIlE77yOPGJyPjwvcD4=
本课配套习题挑战模式2/5
单选题
难度系数：
2.如图，菱形ABCD中，∠B=60°，AB=2cm，E、F分别是BC、CD的中点，连接AE、EF、AF，则△AEF的周长为（）
A: 2 |
| B: 3 |
| C:4 |
| D: 3 |
一次做对，真牛！
+5奖励规则>
- 提示1：6aaW5YWI5qC55o2u6I+x5b2i55qE5oCn6LSo6K+B5piO4pazQUJF4omM4pazQURG77yM54S25ZCO6L+e5o6lQUPlj6/mjqjlh7rilrNBQkPku6Xlj4rilrNBQ0TkuLrnrYnovrnkuInop5LlvaI=
- 提示2：5qC55o2u562J6IWw5LiJ6KeS5b2i5LiJ57q/5ZCI5LiA55qE5a6a55CG5Y+I5Y+v5o6o5Ye64pazQUVG5piv562J6L655LiJ6KeS5b2i
- 提示3：5qC55o2u5Yu+6IKh5a6a55CG5Y+v5rGC5Ye6QUXnmoTplb/nu6fogIzmsYLlh7rlkajplb/vvI4=
- 答案：Qg==
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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，两个全等菱形的边长为1厘米，一只蚂蚁由A点开始按ABCDEF的顺序按菱形的边循环运动，行走2011厘米后停下，则这只蚂蚁停在( )
| A: B点 |
| B:C点 |
| C: D点 |
| D: E点 |
一次做对，真牛！
+5奖励规则>
- 提示1：5qC55o2u6aKY5oSP77yM6JqC6JqB5oyJQUJDREVGQ0dB55qE6aG65bqP5rK/6I+x5b2i55qE6L655b6q546v6L+Q5Yqo77yM5q+P6LWwMeS4qjhjbe+8jOWwseWbnuWIsEHngrk=
- 提示2：55SxMjAxMcO3OD0yNTHigKYz77yM5Y2z5Y+v5o6o5Ye65b2T6LWw5LqGMjUx5LiqOGNt55qE5pe25YCZ77yM6JqC6JqB5Zue5YiwQeeCue+8jOeEtuWQjuWGjeaMiemhuuW6j+i1sDNjbe+8jOWNs+WPr+aOqOWHuue7k+aenO+8jg==
- 答案：Qw==
6Kej77ya4oi1QUI9QkM9Q0Q9REU9RUY9RkM9Q0c9R0E9MWNt77yMPGJyPuKItOiaguiageaMiUFCQ0RFRkNHQeeahOmhuuW6j+ayv+iPseW9oueahOi+ueW+queOr+i/kOWKqO+8jOavj+i1sDHkuKo4Y23vvIzlsLHlm57liLBB54K577yMPGJyPuKItTIwMTHDtzg9MjUx4oCmM++8jDxicj7iiLTooYzotbAyMDExY23lkI7lgZzkuIvvvIzomoLomoHlgZzlnKhE54K577yOPGJyPuaVhemAiUPvvI4=
本课配套习题挑战模式4/5
单选题
难度系数：
4.已知菱形ABCD的边长为8，∠A=120°，则对角线BD长是多少( )
| A: 12 |
B:  |
| C: 8 |
D:  |
一次做对，真牛！
+5奖励规则>
- 提示1：5qC55o2u6I+x5b2i55qE5oCn6LSo5Y+v5b6X5Yiw4pazQUNE5piv562J6L655LiJ6KeS5b2i77yM5LuO6ICM5Y+v5b6X5YiwQUPnmoTplb8=
- 提示2：5qC55o2u5Yu+6IKh5a6a55CG5Y+v5rGC5b6XRE/nmoTplb/vvIzku47ogIzlsLHlvpfliLDkuoZCROeahOmVv++8jg==
- 答案：RA==
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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，菱形ABCD中，对角线AC、BD相交于点O，点E是AB的中点，已知AC=8cm，BD=6cm，则OE的长为（ ）
A:  |
| B: 2 |
C:  |
| D: 3 |
一次做对，真牛！
+5奖励规则>
- 提示1：5qC55o2u6I+x5b2i55qE5oCn6LSo5Y+K5Lit5L2N57q/5a6a55CG6Kej562U77yO
- 答案：Qw==
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
