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.
某商场内，电梯AB段的铅直高度与水平宽度如图所示，则电梯AB段的坡度i是
（ ）
| A: 1:2 |
| B: 2:4 |
| C: 1:5 |
| D: 2:1 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5ZyoUnTilrNBQkPkuK3vvIzlt7Lnn6Xnm7Top5LovrlCQ+OAgUFD55qE6ZW/77yM5Y2z5Y+v5rGC5b6X4oigQkFD55qE5q2j5YiH5YC877yM5Y2z5pac5Z2hQULnmoTlnaHluqYuPC9wPg==
- 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.某水坝的坡度i=1：
，坡长AB=20米，则坝的高度为（ ）米
，坡长AB=20米，则坝的高度为（ ）米 | A: 10 |
| B: 20 |
| C: 40 |
| D: 20 |
一次做对，真牛！
+5奖励规则>
- 提示1：IOeUu+WHuuWbvuW9ou+8jOagueaNruWdoeW6pueahOWumuS5iS0tLeebtOinkuS4ieinkuW9ouS4re+8jOWdoeinkueahOato+WIh+WAvA==
- 提示2：IOeEtuWQjuWIqeeUqOino+ebtOinkuS4ieinkuW9oueahOefpeivhuino+etlA==
- 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.
如图是某商场一楼与二楼之间的手扶电梯示意图. 其中AB，CD分别表示一楼，二楼地面的水平线，∠ABC=150°，BC的长是8m，则乘电梯从点B到点C上升的高度h是
（ ）
| A: 83 √3米 |
| B: 4米 |
| C: 4√3米 |
| D: 8米 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+6L+HQ+S9nENF4oqlQULvvIzlt7Lnn6VBQkM9MTUwwrDvvIzljbPlt7Lnn6XiiKBDQkU9MzDCsO+8jOagueaNruS4ieinkuWHveaVsOWwseWPr+S7peaxguinoy48YnI+PC9wPjxwPuKAi+KAi+KAizxpbWcgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8xMi9CRS9yQkFDRkZNVUswekFuNV9SQUFBUEJXNDFnams4NjUucG5nIiBkYXRhLWNrZS1zYXZlZC1zcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzEyL0JFL3JCQUNGRk1VSzB6QW41X1JBQUFQQlc0MWdqazg2NS5wbmciIGFsdD0iIiBzdHlsZT0id2lkdGg6IDI1NHB4OyBoZWlnaHQ6IDg5cHg7Ij48YnI+PC9wPg==
- 答案：Qg==
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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，如果在高为2m，坡度为1：2的楼梯上铺地毯，那么地毯的长度至少应截取
（ ）
| A: 2m |
| B: 6m |
| C:
|
| D: （6+ |
m
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+55Sx5Zyo6auY5Li6Mm3vvIzlnaHluqbkuLox77yaMueahOalvOair+S4iumTuuWcsOavr++8jOWPr+axguW+l+WcsOavr+WcqOawtOW5s+mdouS4iueahOmVv+W6pkJD55qE6ZW/PC9wPjxwPjxpbWcgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8xMi9CRi9yQkFDRkZNVUsteUFYT05NQUFBT0duTHpMNGsyNjQucG5nIiBkYXRhLWNrZS1zYXZlZC1zcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzEyL0JGL3JCQUNGRk1VSy15QVhPTk1BQUFPR25Mekw0azI2NC5wbmciIGFsdD0iIiBzdHlsZT0id2lkdGg6IDE0MXB4OyBoZWlnaHQ6IDk2cHg7Ij48YnI+PC9wPg==
- 提示2：PHA+55Sx5Zyw5q+v55qE6ZW/5bqm6Iez5bCR5pivQUPkuI5CQ+eahOWSjO+8jOWNs+WPr+axguW+l+etlOahiC48YnI+PC9wPg==
- 答案：Qg==
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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，山顶一铁塔AB在阳光下的投影CD的长为6米，此时太阳光与地面的夹角∠ACD=60°，则铁塔AB的高为（ ）
| A: 6√3 米 |
| B: 3米 |
| C: 2米 |
| D: 2√3 米 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+PHNwYW4gc3R5bGU9ImNvbG9yOiByZ2IoMCwgMCwgMCk7IGZvbnQtZmFtaWx5OiDlrovkvZMsIHNhbnMtc2VyaWY7IGZvbnQtc2l6ZTogMTNweDsgbGV0dGVyLXNwYWNpbmc6IDFweDsgbGluZS1oZWlnaHQ6IDI1cHg7Ij7kvp3mja7lubPooYzkuo7kuInop5LlvaLkuIDovrnnmoTnm7Tnur/miKrlhbbku5bkuKTovrnmiYDlvpfnmoTnur/mrrXlr7nlupTmiJDmr5TkvovvvIzku6Xlj4o2MMKw55qE5q2j5YiH5YC85pivPC9zcGFuPjxzcGFuIGNsYXNzPSJtYXRocXVpbGwtcmVuZGVyZWQtbWF0aCIgc3R5bGU9ImZvbnQtc2l6ZToyMHB4OyI+PHNwYW4gY2xhc3M9InRleHRhcmVhIj48dGV4dGFyZWEgZGF0YS1ja2UtZWRpdGFibGU9IjEiIGNvbnRlbnRlZGl0YWJsZT0iZmFsc2UiPjwvdGV4dGFyZWE+PC9zcGFuPjxzcGFuIGNsYXNzPSJub24tbGVhZiIgbWF0aHF1aWxsLWNvbW1hbmQtaWQ9IjQiPjxzcGFuIGNsYXNzPSJzY2FsZWQgc3FydC1wcmVmaXgiIHN0eWxlPSItd2Via2l0LXRyYW5zZm9ybTogc2NhbGUoMSwgMC45KTsiPuKImjwvc3Bhbj48c3BhbiBjbGFzcz0ibm9uLWxlYWYgc3FydC1zdGVtIiBtYXRocXVpbGwtYmxvY2staWQ9IjUiPjxzcGFuIG1hdGhxdWlsbC1jb21tYW5kLWlkPSI3Ij4zPC9zcGFuPjwvc3Bhbj48L3NwYW4+PC9zcGFuPjxzcGFuPiZuYnNwOzwvc3Bhbj48c3BhbiBzdHlsZT0iY29sb3I6IHJnYigwLCAwLCAwKTsgZm9udC1mYW1pbHk6IOWui+S9kywgc2Fucy1zZXJpZjsgZm9udC1zaXplOiAxM3B4OyBsZXR0ZXItc3BhY2luZzogMXB4OyBsaW5lLWhlaWdodDogMjVweDsiPuiBlOeri+axguino++8jjwvc3Bhbj48L3A+
- 答案：QQ==
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
