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.
小明在测量楼高时，先测出楼房落在地面上的影长BA为15米（如图），然后在A处树立一根高2米的标杆，测得标杆的影长AC为3米，则楼高为（ ）
| A: 10米 |
| B: 12米 |
| C: 15米 |
| D: 22.5米 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5Zyo5ZCM5LiA5pe25Yi754mp6auY5ZKM5b2x6ZW/5oiQ5q2j5q+U77yM5Y2z5Zyo5ZCM5LiA5pe25Yi755qE5Lik5Liq54mp5L2T77yM5b2x5a2Q77yM57uP6L+H54mp5L2T6aG26YOo55qE5aSq6Ziz5YWJ57q/5LiJ6ICF5p6E5oiQ55qE5Lik5Liq55u06KeS5LiJ6KeS5b2i55u45Ly8LiDmoLnmja7nm7jkvLzkuInop5LlvaLnmoTlr7nlupTovrnnmoTmr5Tnm7jnrYnvvIzljbPlj6/msYLop6MuPC9wPg==
- 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.
如图，为估算某河的宽度，在河对岸选定一个目标点A，在近岸取点B，C，D，使得AB⊥BC，CD⊥BC，点E在BC上，并且点A，E，D在同一条直线上. 若测得BE=20m，CE=10m，CD=20m，则河的宽度AB等于（ ）
| A: 60m |
| B: 40m |
| C: 30m |
| D: 20m |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+55Sx5Lik6KeS5a+55bqU55u4562J5Y+v5b6X4pazQkFF4oi94pazQ0RF77yM5Yip55So5a+55bqU6L655oiQ5q+U5L6L5Y+v5b6X5Lik5bK46Ze055qE5aSn6Ie06Led56a7QUIuPC9wPg==
- 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，夏季的一天，身高为1.6m的小玲想测量一下屋前大树的高度，她沿着树影BA由B到A走去，当走到C点时，她的影子顶端正好与树的影子顶端重合，测得BC=3.2m，CA=0.8m，于是得出树的高度为（ ）
| A: 8m |
| B: 6.4m |
| C: 4.8m |
| D: 10m |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5rGC5Ye6QULnmoTplb/luqbvvIznhLblkI7moLnmja7nm7jkvLzkuInop5LlvaLlr7nlupTovrnmiJDmr5TkvovliJflh7rmr5TkvovlvI/msYLop6PljbPlj68uPC9wPg==
- 答案：QQ==
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
本课配套习题挑战模式4/5
单选题
难度系数：
4.
如图，小李打网球时，球恰好打过网，且落在离网4m的位置上，则球拍击球的高度h为（ ）
| A: 0.6m |
| B: 1.2m |
| C: 1.3m |
| D: 1.4m |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5Yip55So5bmz6KGM5b6X5Ye65LiJ6KeS5b2i55u45Ly877yM6L+Q55So55u45Ly85q+U5Y2z5Y+v6Kej562ULjwvcD4=
- 答案：RA==
PHA+6Kej77ya4oi1QULiiKVERe+8jDxicj48aW1nIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvNjEvNUIvckJBQ0ZGUGZDS0RESGRVUUFBQld1azFnNU9vMjk2LnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC82MS81Qi9yQkFDRkZQZkNLRERIZFVRQUFCV3VrMWc1T28yOTYucG5nIiBhbHQ9IumdkuaenOWtpumZoiIgaGVpZ2h0PSIxMDAiIHdpZHRoPSIyNjYiPjxicj7iiLQ8aW1nIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvNjEvNUIvckJBQ0ZGUGZDS0RoRGhJSkFBQUNIWF9fbGRzNzY1LnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC82MS81Qi9yQkFDRkZQZkNLRGhEaElKQUFBQ0hYX19sZHM3NjUucG5nIiBoZWlnaHQ9IjQyIiB3aWR0aD0iNjEiPjxicj7iiLQ8aW1nIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvOUUvRTEvckJBQ0UxUGZDS0N6bExUZ0FBQUI5UVQyX3ZzNDQ1LnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC85RS9FMS9yQkFDRTFQZkNLQ3psTFRnQUFBQjlRVDJfdnM0NDUucG5nIiBoZWlnaHQ9IjQyIiB3aWR0aD0iNTAiPjxicj7iiLRoPTEuNG0uPGJyPuaVhemAie+8mkQuPC9wPg==
本课配套习题挑战模式5/5
单选题
难度系数：
5.
某校数学兴趣小组为测量学校旗杆AC的高度，在点F处竖立一根长为1.5米的标杆DF，如图所示，量出DF的影子EF的长度为1米，再量出旗杆AC的影子BC的长度为6米，那么旗杆AC的高度为（ ）
| A: 6米 |
| B: 7米 |
| C: 8.5米 |
| D: 9米 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5Zyo5ZCM5LiA5pe25Yi754mp6auY5ZKM5b2x6ZW/5oiQ5q2j5q+U77yM5Y2z5Zyo5ZCM5LiA5pe25Yi755qE5Lik5Liq54mp5L2T77yM5b2x5a2Q77yM57uP6L+H54mp5L2T6aG26YOo55qE5aSq6Ziz5YWJ57q/5LiJ6ICF5p6E5oiQ55qE5Lik5Liq55u06KeS5LiJ6KeS5b2i55u45Ly8LiDmoLnmja7nm7jkvLzkuInop5LlvaLnmoTlr7nlupTovrnnmoTmr5Tnm7jnrYnvvIzljbPlj6/msYLop6MuPC9wPg==
- 答案：RA==
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
