如图1为某立交桥示意图(道路宽度忽略不计),
为高架,以O为圆心的圆盛
位于高架下方,其中
为直行道,且
,弯道
是以点O为圆心的圆上的一段弧(立交桥的上下高度差忽略不计),点B,C,D,E是圆盘O的四等分点.某日凌晨,有甲、乙、丙、丁四车均以
的速度由A口驶入立交桥,并分别从各出口驶出,若各车到圆心O的距离
与从A口进入立交后的时间
的对应关系如图2所示,则下列说法错误 的是( )
![](https://img.xkw.com/dksih/QBM/2021/3/25/2685356401639424/2685500521594880/STEM/3fc16387-0108-478b-8c42-638893357ab7.png?resizew=521)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db8d12f6479a5c467202749cb720a9ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f09da61eec11df1b71f5c49b0919c4e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fcb344a78369d4c52496abb06f94035.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4a393a1fbe722885e3ba690bcfd556.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9117cc2ccde9e7e9fba69e89c54b78d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bee9934d3bdf4a8075b4fc340f976252.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18eaed5e51f1e0be4f756230c41c6504.png)
![](https://img.xkw.com/dksih/QBM/2021/3/25/2685356401639424/2685500521594880/STEM/3fc16387-0108-478b-8c42-638893357ab7.png?resizew=521)
A.甲车在立交桥上共行驶![]() | B.从J口出的两车在立交桥上行驶的时间相差![]() |
C.丙、丁两车均从J口出立交 | D.从I口出的车比从H口出的车在立交桥上多行驶![]() |
19-20九年级下·浙江·期中 查看更多[1]
(已下线)【新东方】 义乌数学初三下【00005】
更新时间:2021-04-02 10:16:05
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【推荐1】甲、乙两人沿相同的路线由A地到B地匀速前进,A、B两地间的路程为40km.他们前进的路程为s(km),甲出发后的时间为t(h),甲、乙前进的路程与时间的函数图象如图所示.根据图象信息,下列说法不正确的是( )
![](https://img.xkw.com/dksih/QBM/2019/4/10/2179320518377472/2184511414026240/STEM/102e66df72d245a69fb32cf4220ec1c1.png?resizew=141)
![](https://img.xkw.com/dksih/QBM/2019/4/10/2179320518377472/2184511414026240/STEM/102e66df72d245a69fb32cf4220ec1c1.png?resizew=141)
A.甲的速度是10km/h | B.乙的速度是20km/h |
C.乙出发![]() | D.甲比乙晚到B地2h |
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【推荐2】笔直的海岸线上依次有A,B,C,三个港口,甲船从A港口出发,沿海岸线匀速驶向C港口,
小时后乙船从
港口出发,沿海岸线匀速驶向A港口,两船同时到达目的地.甲船的速度是乙船的
倍,甲、乙两船与
港口的距离
与甲船行驶时间x
之间的函数关系如图所示.给出下列说法:①
,
港口相距
;②甲船的速度为
;③
,
港口相距
;④乙船出发
时,两船相距
.其中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/2/6c605c45-56c4-4e66-bf9c-c001cff7d6bd.png?resizew=229)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c7bb4c9ee43dbf9efe04facd3677dab.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/710bd884a6a2209e0148772218a623ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edfa4962f522dd8285f2e2c41c73c1af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30290c23cf5058b29f69803bbd434654.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a855f9229cb4f2f4396ec9d6862dfb7b.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db991aec2b6bed9048e7c854524d940a.png)
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A.①②③ | B.②③④ | C.①②④ | D.①③④ |
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【推荐1】如图①,在矩形
中,H为
边上的一点,点M从点A出发沿折线
运动到点B停止,点N从点A出发沿
运动到点B停止,它们的运动速度都是
,若点M、N同时开始运动,设运动时间为
,
的面积为
,已知S与t之间函数图象如图②所示,则下列结论不正确的是( )
为等腰三角形的点M一共有4个.
②当
时,
.
③当
时,
.
④当
时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4bf2ed4e49655ce765ba6ffbb6c7d28.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f372e567a416d3dc405b2b0d72506b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f9fba8a4098c1a0515286eb8d616dc.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0255aeb7e872740911e79ac5f79eed05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d87192c7368b3f1d454ee9c7980f01e.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d415a551223d2a942cc67f8ce68d267.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50c64398e20399cdd283eee9fc35f4d9.png)
④当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e099f51ad74647388ba416157128c5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10e9572d315dc2ebd198eca5da3c2ffa.png)
A.① | B.② | C.③ | D.④ |
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【推荐2】如图,在
中,
,
,E是AB的中点,过点E作AC和BC的垂线,垂足分别为点E和点F,四边形CDEF沿着CA方向匀速运动,当点C与点A重合时停止运动,设运动时间为t,运动过程中四边形CDEF与
重叠部分面积为S,则下列图象能大致反映S与t之间函数关系的是( )
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A.![]() | B.![]() | C.![]() | D.![]() |
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