用图1中的长方形和正方形纸板作侧面和底面,做成图2中的竖式和横式的两种无盖纸盒.现有1000张正方形纸板和2000张长方形纸板,如果制作竖、横式两种纸盒若干个,恰好将纸板用完,那么制作的竖式礼盒有( )
![](https://img.xkw.com/dksih/QBM/2022/5/11/2977130528096256/3341886381367296/STEM/795395fd9dfb4dbe8a1d36d5118ea218.png?resizew=107)
![](https://img.xkw.com/dksih/QBM/2022/5/11/2977130528096256/3341886381367296/STEM/4e13edb855f44d1a9f5125d0c6b74fb2.png?resizew=64)
![](https://img.xkw.com/dksih/QBM/2022/5/11/2977130528096256/3341886381367296/STEM/795395fd9dfb4dbe8a1d36d5118ea218.png?resizew=107)
图1 图2
A.200个 | B.400个 | C.600个 | D.800个 |
更新时间:2023-10-10 15:11:33
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【知识点】 几何问题(二元一次方程组的应用)解读
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【推荐1】用四个完全一样的长方形和一个小正方形拼成如图所示的大正方形,若已知大正方形的面积是196,小正方形的面积是4,若用
表示长方形的长和宽,则下列四个等式中不成立的是( )
![](https://img.xkw.com/dksih/QBM/2019/9/24/2297505892851712/2297557374926848/STEM/38acbf42-aa84-40d0-b846-97d75d1f5b2c.png?resizew=179)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1542991c51888fb78b99e77c81a8dbea.png)
![](https://img.xkw.com/dksih/QBM/2019/9/24/2297505892851712/2297557374926848/STEM/38acbf42-aa84-40d0-b846-97d75d1f5b2c.png?resizew=179)
A.![]() | B.![]() |
C.![]() | D.![]() |
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【推荐2】将两块完全相同的长方体木块先按图1的方式放置,再按图2的方式放置,测得的数据如图(单位:
)所示.则桌子的高度![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa825d4bda07eff36a417d80afde34aa.png)
![](https://img.xkw.com/dksih/QBM/2019/6/25/2233112236498944/2233453606273025/STEM/7a56aba0c2784cd1b02abe964c5b0f27.png?resizew=99)
图1 图2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa825d4bda07eff36a417d80afde34aa.png)
![](https://img.xkw.com/dksih/QBM/2019/6/25/2233112236498944/2233453606273025/STEM/db281a83ff294c71b83ca54d5ce0e013.png?resizew=108)
![](https://img.xkw.com/dksih/QBM/2019/6/25/2233112236498944/2233453606273025/STEM/7a56aba0c2784cd1b02abe964c5b0f27.png?resizew=99)
图1 图2
A.![]() | B.![]() | C.![]() | D.![]() |
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