1 . 2021年5月,“双减”政策出台,教培时代落幕,新东方捐出八万套桌椅,受到广大网民的好评.现有600套相同的桌椅要捐赠给某地的3所乡村小学,每所学校都能获赠且获赠的桌椅套数都是100的整数倍,则不同的捐赠方案种数是( )
A.10 | B.15 | C.24 | D.36 |
您最近一年使用:0次
2 . 调查显示,某地区一天共享电动车的使用者中,年龄在
岁之间、
岁之间、50岁以上的人数分别为280,180,40.现采用分层随机抽样的方法从中抽取
名使用者参与调查,其中年龄在
岁之间的人数为9,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b550f1a7e3fdb1a13b4a4edc136f882.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/977ba7db1881a4172e9d5feb4452d904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/977ba7db1881a4172e9d5feb4452d904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
A.25 | B.24 | C.22 | D.20 |
您最近一年使用:0次
3 . 已知
是边长为1的等腰直角三角形,以
的斜边AC为直角边,画第一个等腰
,再以
的斜边AD为直角边,画第二个等腰
,…,依此类推,则画出的第2023个等腰直角三角形的面积是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/4/c57e36dc-6e9f-4d96-96d6-72e0daa8b04d.jpg?resizew=152)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ce5d6ca24e249f7172e51c154509b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ce5d6ca24e249f7172e51c154509b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40e7ba6e267dde1a65a98f9f36b585ce.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/4/c57e36dc-6e9f-4d96-96d6-72e0daa8b04d.jpg?resizew=152)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
4 . 下列各式:①
;②
;③
;④
;⑤
,其中计算正确的个数有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/111848feaac6190bc8d4f98c56aaa93d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19085f2f3fa5264f5ec1a9fcf7e30330.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba92522ec440429bc91ed5a359a9f8c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fff58e47500ee4ed5b74453118d94980.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c256c5c9e5b75bb4025d3cad9145183.png)
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次
5 . 已知
是二次函数
图象上的一系列点,其中
,记
(n为正整数),令
,则S的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fb1b052b4fbeab908e1e3d4a2903f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5109eb35b9c16fc5e128198a1819a44c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4f74cba0f2dcda7e483808b7aaaabb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c414502a9d5420715cb39e6fc2d64c47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeaeefb8d052ab78155b326f7392555d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
6 . 已知点
,
,
均在抛物线
上,下列说法中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c5d57111dd825830d87e5a8ba28cf9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b5e695fbbd1a4c076757c2172e9ff5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/213632685641d1d75ce7e827db800b26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68846e796086eeff26e70135fdff94fb.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
7 . 若
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b43498cdea91037bd093c1100af4f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.![]() ![]() |
您最近一年使用:0次
8 . 如图,在
中,
,
,
以点
为圆心,
的长为半径画弧,交线段
于点
,以点A为圆心,
长为半径画弧,交线段
于点
,则下列线段的长度是方程
的一个根的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/fbed1bc0-8bbc-4819-b62e-2b117767ee93.png?resizew=145)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ed8f7d3d7043d4b1eb98fc5c4e2fcd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e781a2489271bfd1597cba1bb6f5887.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b148ebf7b5ca9cc3a6f1dfe3117cbc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7531f413a2b9bb13bab60e2b00569aeb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/fbed1bc0-8bbc-4819-b62e-2b117767ee93.png?resizew=145)
A.线段![]() | B.线段![]() |
C.线段![]() | D.线段![]() |
您最近一年使用:0次
9 . 如图,长为
的橡皮筋放置在
轴上,固定两端
和
,然后把中点
向上拉升
至
点,则橡皮筋被拉长了( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/99c5d5e7-683f-4fd9-a08a-7e52accda875.png?resizew=167)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80b1fe1b971b780e443a9b13621611c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/976260cbf5e30856d4fd37a4b0a671a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/17/99c5d5e7-683f-4fd9-a08a-7e52accda875.png?resizew=167)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
10 . 在线段
上有P、Q两点,
,求
的长( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ed57f367faad251495c6640760bcb33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
A.1 | B.23 | C.1或23 | D.12 |
您最近一年使用:0次