国家近年来实施了新一轮农村电网改造升级工程,解决了农村供电“最后1公里”问题,电力公司在改造时把某一输电线铁塔建在了一个坡度为1:0.75的山坡CD的平台BC上(如图),测得∠AED=52°,BC=5米,CD=35米,DE=19米,则铁塔AB的高度约为(参考数据:sin52°≈0.79,tan52°≈1.28)( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/29/5adaba74-af6f-4540-9867-07dba86d29e1.png?resizew=197)
A.28米 | B.29.6米 | C.36.6米 | D.57.6米 |
更新时间:2020-02-26 18:03:10
|
【知识点】 坡度坡比问题(解直角三角形的应用)
相似题推荐
单选题
|
适中
(0.65)
真题
【推荐1】如图,相邻两个山坡上,分别有垂直于水平面的通信基站MA和ND.甲在山脚点C处测得通信基站顶端M的仰角为60°,测得点C距离通信基站MA的水平距离CB为30m;乙在另一座山脚点F处测得点F距离通信基站ND的水平距离FE为50m,测得山坡DF的坡度i=1:1.25.若
,点C,B,E,F在同一水平线上,则两个通信基站顶端M与顶端N的高度差为( )(参考数据:
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e4d43b80c20a430ecd1864df4943c1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cea34f4d3f2df4e62c5fe4a8a5693d4.png)
A.9.0m | B.12.8m | C.13.1m | D.22.7m |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐2】学习了三角函数的相关知识后,小丽测量了斜坡上一棵垂直于地面的大树的高度.如图,小丽先在坡角为
的斜坡
上的点A处,测得树尖E的仰角为
,然后沿斜坡走了10米到达坡脚B处,又在水平路面上行走20米到达大树所在的斜坡坡脚C处,大树所在斜坡的坡度
,且大树与坡脚的距离
为15米,则大树
的高度约为( )
(参考数据:
结果精确到0.1)
![](https://img.xkw.com/dksih/QBM/2021/12/17/2874427532820480/2875926453886976/STEM/5877de06-59fd-42bb-9855-4951a856da53.png?resizew=231)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76c12e76fbd84eeec721386bd3b04cc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ebdab0c110e9b9642020d6863e2311e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c0869ac6be60c8b2d45f06cb10203cf.png)
![](https://img.xkw.com/dksih/QBM/2021/12/17/2874427532820480/2875926453886976/STEM/5877de06-59fd-42bb-9855-4951a856da53.png?resizew=231)
A.10.9米 | B.11.0米 | C.6.9米 | D.7.0米 |
您最近一年使用:0次
单选题
|
适中
(0.65)
名校
【推荐3】2022年北京冬季奥运会日益临近,国家跳台滑雪中心建设已初具规模,国家跳台滑雪中心的赛道
线剖面因与中国传统吉祥饰物“如意”的
形曲线契合,被形象地称为“雪如意”.“雪如意”的剖面示意图如图:跳台由顶部的顶峰平台
、中部的大跳台腾空起点
、赛道
、底部的看台区
组成.为有效进行工程施工监测,现在
处设置了监测标志旗(标志旗高度忽略不计),
赛道可近似视作坡度为
的一段坡面,通过
高程测量仪测得
点、
点的海拔高度差(即
)是160米,从顶峰平台
点俯视
处的标志旗,俯角约为37°.由
处释放的遥控无人机竖直上升到与平台
水平位置
后,遥感测得
之间距离为152米,若图中各点均在同一平面,则
赛道长度约为( )米.(参考数据:
,
,
)
![](https://img.xkw.com/dksih/QBM/2020/12/25/2621880536129536/2680699232985088/STEM/48815251-b5df-4452-b278-963a6781ae36.png)
![](https://img.xkw.com/dksih/QBM/2020/12/25/2621880536129536/2680699232985088/STEM/c2942926-abc8-4481-b029-e2abf1292b14.png?resizew=236)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f506e1c5584ae3c4d287c49f75a752dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d4e9396c1513537011e542120abd7dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0494dafbea4df1d95c758ddb656afa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78bccacbdde830e1329412e3e8f42ea9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d0062f4f00732a0cf11d1ac145c218b.png)
![](https://img.xkw.com/dksih/QBM/2020/12/25/2621880536129536/2680699232985088/STEM/48815251-b5df-4452-b278-963a6781ae36.png)
![](https://img.xkw.com/dksih/QBM/2020/12/25/2621880536129536/2680699232985088/STEM/c2942926-abc8-4481-b029-e2abf1292b14.png?resizew=236)
A.116.2 | B.118.4 | C.119.6 | D.121.2 |
您最近一年使用:0次