中学生网络课堂本课配套习题挑战模式1/4
单选题
难度系数：
1.在△ABC中，已知
，则b=（）
，则b=（） A:  |
B:  |
C:  |
| D: 16 |
一次做对，真牛！
+5奖励规则>
- 提示1：IEE9MTgwwrDigJRC4oCUQz00NcKw
- 提示2：IDxpbWcgd2lkdGg9NjIgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMzUvMDAvckJBQ0UxUTdvYWFCVUV4UUFBQUNJcHg2aTQwNDU4LnBuZyI+
- 提示3：IDxpbWcgd2lkdGg9MjkyIGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzAyLzY4L3JCQUNKbFE3b2FlRE40MFZBQUFFVks3NVRyRTgxNS5wbmciPg==
- 答案：Qw==
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
本课配套习题挑战模式2/4
单选题
难度系数：
2.在三角形ABC中，若∠A=60°，∠B=45°，BC=
，则AC=（）
，则AC=（） A:  |
B:  |
C:  |
D:  |
一次做对，真牛！
+5奖励规则>
- 提示1：IDxpbWcgd2lkdGg9NjIgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvNjMvMEIvckJBQ0UxU2pUdl94Z0lOS0FBQUNJRnNmdVdJMTQ2LnBuZyI+
- 提示2：IHNpbkE9c2luNjDCsD08aW1nIHdpZHRoPTEyIGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzkwLzAxL3JCQUNGRlNqVHZfakZfNDhBQUFCWUVuUGdjMDY3MS5wbmciPu+8jHNpbkI9c2luNDXCsD08aW1nIHdpZHRoPTEyIGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzkwLzAxL3JCQUNGRlNqVHYtQmF5S0hBQUFCVWpETjhoNDI4Mi5wbmciPu+8jEJDPTxpbWcgd2lkdGg9MjUgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvOTAvMDEvckJBQ0ZGU2pUdl94UXdGM0FBQUJsQVMtUWhNMzQ0LnBuZyI+
- 答案：Qg==
6Kej5p6Q77ya5Zyo5LiJ6KeS5b2iQUJD5Lit77yM4oigQeaYr+i+uUJD55qE5a+56KeS77yM4oigQuaYr+i+uUFD55qE5a+56KeS77yM5qC55o2u5q2j5bym5a6a55CG77yMPGltZyB3aWR0aD02MiBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC82My8wQi9yQkFDRTFTalR2X3hnSU5LQUFBQ0lGc2Z1V0kxNDYucG5nIj7vvIzlt7Lnn6VzaW5BPXNpbjYwwrA9PGltZyB3aWR0aD0xMiBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC85MC8wMS9yQkFDRkZTalR2X2pGXzQ4QUFBQllFblBnYzA2NzEucG5nIj7vvIxzaW5CPXNpbjQ1wrA9PGltZyB3aWR0aD0xMiBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC85MC8wMS9yQkFDRkZTalR2LUJheUtIQUFBQlVqRE44aDQyODIucG5nIj7vvIxCQz08aW1nIHdpZHRoPTI1IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzkwLzAxL3JCQUNGRlNqVHZfeFF3RjNBQUFCbEFTLVFoTTM0NC5wbmciPu+8jOWImTxpbWcgd2lkdGg9NTUgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMkYvMDgvckJBQ0psU2pUd0NSNWxpcUFBQUNZT1ZteG9JOTk4LnBuZyI+77yM5omA5LulQUM9PGltZyB3aWR0aD0xMjUgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMkYvMDgvckJBQ0psU2pUd0NDNWVkS0FBQURCeEtVdjlBMDM0LnBuZyI+44CC5pWF6YCJQg==
本课配套习题挑战模式3/4
单选题
难度系数：
3.在△ABC中，
A:  |
B:  |
C:  |
D:  |
一次做对，真牛！
+5奖励规则>
- 提示1：IDxpbWcgd2lkdGg9NjIgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMzUvMDAvckJBQ0UxUTdvYWFCVUV4UUFBQUNJcHg2aTQwNDU4LnBuZyI+77yM5bey55+lPGltZyB3aWR0aD05NyBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8zNS8wMC9yQkFDRTFRN29iVGdicFhTQUFBQ0NYbGVTMDQ2MTcucG5nIj7vvIxzaW5BPXNpbjYwwrA9PGltZyB3aWR0aD0xMiBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC80Ni8yNi9yQkFDRkZRN29aN0F5S0lhQUFBQllBSm5jT1U0NzgucG5nIj4=
- 提示2：IHNpbkI8aW1nIHdpZHRoPTI3IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzQ2LzI3L3JCQUNGRlE3b2JYeWIyZ1pBQUFCZXlxYkl5czA1MC5wbmciPu+8jDxpbWcgd2lkdGg9MTE1IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzAyLzY4L3JCQUNKbFE3b2JhUXJUQm5BQUFDYXd1SUpwTTA3MC5wbmciPg==
- 提示3：IDxpbWcgd2lkdGg9NjEgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMDIvQkIvckJBQ0oxUTdvYmF6YkVYNkFBQUI3RzRtOW1VMTkyLnBuZyI+77yMIELvvJxBPTYwwrA=
- 答案：RA==
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
本课配套习题挑战模式4/4
单选题
难度系数：
4.△ABC的内角A、B、C的对边分别为
，若
，则
等于（ ）
，若，则等于（ ） A:  |
| B: 2 |
C:  |
D:  |
一次做对，真牛！
+5奖励规则>
- 提示1：IDxpbWcgd2lkdGg9NjEgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvNDYvMjcvckJBQ0ZGUTdvYjZqOHRveUFBQUNEWDUwQ0xZMjgxLnBuZyI+77yMPGltZyB3aWR0aD05OCBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8zNS8wMC9yQkFDRTFRN29iNng2VDhaQUFBQ09JX3lxajg5NDEucG5nIj7vvIxzaW5CPXNpbjEyMMKwPTxpbWcgd2lkdGg9MTIgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvNDYvMjYvckJBQ0ZGUTdvWjdBeUtJYUFBQUJZQUpuY09VNDc4LnBuZyI+
- 提示2：IHNpbkM8aW1nIHdpZHRoPTIwIGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzQ2LzI3L3JCQUNGRlE3b2I3QUNvSFdBQUFCTVQ1bGliWTg5NC5wbmciPu+8jDDvvJxD77ycNjDCsA==
- 提示3：IEM9QT0zMMKw
- 答案：RA==
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
