如下图所示,一个小球由坡底沿着坡度为1∶2的坡面前进了10米,此时小球在竖直方向上上升了( )
![](https://img.xkw.com/dksih/QBM/2022/4/18/2960867204128768/2973678387585024/STEM/09db5b3e05a940c2b2fa940ecd674781.png?resizew=159)
![](https://img.xkw.com/dksih/QBM/2022/4/18/2960867204128768/2973678387585024/STEM/09db5b3e05a940c2b2fa940ecd674781.png?resizew=159)
A.4米 | B.![]() |
C.5米 | D.![]() |
更新时间:2022-05-06 18:27:04
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【推荐1】如图,湖的两端有A,B两点,从与BA方向成直角的BC方向上的点C测得CA=130 m,CB=120 m,则AB为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/8/267d93d9-156f-47a4-b528-de8580cad8fc.png?resizew=155)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/8/267d93d9-156f-47a4-b528-de8580cad8fc.png?resizew=155)
A.30 m | B.40 m |
C.50 m | D.60 m |
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【推荐2】如图,在
中,
,
,
,D是边
的中点,则线段
的长为( )
![](https://img.xkw.com/dksih/QBM/2023/7/21/3285587037200384/3288588147736576/STEM/acbcebee144f49708e1c2f4397e9390b.png?resizew=164)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/2023/7/21/3285587037200384/3288588147736576/STEM/acbcebee144f49708e1c2f4397e9390b.png?resizew=164)
A.5 | B.3 | C.![]() | D.4 |
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【推荐1】如图,斜坡AB与水平面的夹角为α,下列命题中,不正确的是( )
![](https://img.xkw.com/dksih/QBM/2019/2/21/2145050864525312/2147819237187584/STEM/f68bb87fa1a44c099b41c8446458e1dc.png?resizew=103)
![](https://img.xkw.com/dksih/QBM/2019/2/21/2145050864525312/2147819237187584/STEM/f68bb87fa1a44c099b41c8446458e1dc.png?resizew=103)
A.斜坡AB的坡角为α | B.斜坡AB的坡度为![]() |
C.斜坡AB的坡度为tanα | D.斜坡AB的坡度为![]() |
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【推荐2】解放路上一座人行天桥如图所示,坡面BC的铅直高度与水平宽度的比为1:2,为了方便市民推车过天桥,有关部门决定在保持天桥高度的前提下,降低坡度,使新坡面AC的坡度为1:3,AB=6m,则天桥高度CD为( )
![](https://img.xkw.com/dksih/QBM/2019/6/17/2227405634478080/2228153674686464/STEM/fe6aca9cb5cb4b87ba97ab491c77e643.png?resizew=218)
![](https://img.xkw.com/dksih/QBM/2019/6/17/2227405634478080/2228153674686464/STEM/fe6aca9cb5cb4b87ba97ab491c77e643.png?resizew=218)
A.6m | B.6![]() | C.7m | D.8m |
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