13-14高一·全国·课后作业
1 . 工人师傅在如图1的一块矩形铁皮上画一条曲线,沿曲线剪开,将所得到的两部分卷成圆柱状,如图2,然后将其对接,可做成一个直角的“拐脖”,如图3.工人师傅所画的曲线是
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/4/b1d9fc0f-f635-4142-b277-9040489253b0.png?resizew=345)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/4/b1d9fc0f-f635-4142-b277-9040489253b0.png?resizew=345)
A.一段圆弧 | B.一段抛物线 | C.一段双曲线 | D.一段正弦曲线 |
您最近一年使用:0次
13-14高二·全国·课后作业
2 . 如图所示,P、Q分别在BC和AC上,BP∶CP=2∶5,CQ∶QA=3∶4,则
( ).
![](https://img.xkw.com/dksih/QBM/2014/8/6/1571833331859456/1571833337487360/STEM/0980595d6a6f4378a0e0dcc854488ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50c3aea74102ef08bdd93016c249b7b0.png)
![](https://img.xkw.com/dksih/QBM/2014/8/6/1571833331859456/1571833337487360/STEM/0980595d6a6f4378a0e0dcc854488ed3.png)
A.3∶14 | B.14∶3 | C.17∶3 | D.17∶14 |
您最近一年使用:0次
13-14高二·全国·课后作业
3 . 如图所示,已知⊙O的半径为5,两弦AB、CD相交于AB的中点E,且AB=8,CE∶ED=4∶9,则圆心到弦CD的距离为
![](https://img.xkw.com/dksih/QBM/2014/3/25/1571575004364800/1571575009558528/STEM/4227f57634a04273b68fcbb7a0d43dfa.png)
![](https://img.xkw.com/dksih/QBM/2014/3/25/1571575004364800/1571575009558528/STEM/4227f57634a04273b68fcbb7a0d43dfa.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
13-14高二·全国·课后作业
4 . 如图所示,四边形ABCD是⊙O的内接四边形,延长BC到E,已知∠BCD∶∠ECD=3∶2,那么∠BOD等于
![](https://img.xkw.com/dksih/QBM/2014/3/25/1571575323123712/1571575328088064/STEM/afa16a05f8004ce4a6b9850f31f6b919.png)
![](https://img.xkw.com/dksih/QBM/2014/3/25/1571575323123712/1571575328088064/STEM/afa16a05f8004ce4a6b9850f31f6b919.png)
A.120° | B.136° |
C.144° | D.150° |
您最近一年使用:0次
13-14高一·全国·课后作业
5 . 如图,一个底面半径为R的圆柱被与其底面所成角为θ(00<θ<900)的平面所截,截面是一个椭圆.当θ为30°时,这个椭圆的离心率为
![](https://img.xkw.com/dksih/QBM/2014/12/2/1571908403716096/1571908409171968/STEM/da59b6ea-eb19-44d3-97e9-b9691c352b6d.png)
![](https://img.xkw.com/dksih/QBM/2014/12/2/1571908403716096/1571908409171968/STEM/da59b6ea-eb19-44d3-97e9-b9691c352b6d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次