2022年世界女子冰壶锦标赛有若干支队伍参加了单循环比赛(每两支队伍之间都只进行一场比赛),单循环比赛共进行了78场,则参赛的队伍有( )
A.14支 | B.13支 | C.12支 | D.11支 |
更新时间:2022-10-19 16:10:05
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【知识点】 其他问题(一元二次方程的应用)
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单选题
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较易
(0.85)
名校
【推荐1】
是线段
上一点(
),则满足
,则称点
是线段
的黄金分割点.大自然是美的设计师,即使是一片小小的树叶,也蕴含着“黄金分割点”.如图,一片树叶的叶脉
长度为
,
为
的黄金分割点(
),求叶柄
的长度.设
,则符合题意的方程是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd45a31ae7ab224b0ffe68b37234dfe4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48b0974e4d067ee53463bb223e8c2e27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb26c5cdef6f16f4b39cd091041b439.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd45a31ae7ab224b0ffe68b37234dfe4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ae9cd5d955b40aa95e3cf6cc89136b1.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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单选题
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较易
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【推荐2】矩形
中,
,
,点P是
上的动点,当
时,
的长是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f9b9bb0f509e6f3d30858efb217c1f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/23/6d996afc-7cd6-4717-96d2-0b42ad35b3b4.png?resizew=186)
A.1 | B.3 | C.1或3 | D.1或4 |
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