观察并找出图形变化的规律,则第2023个图形中黑色正方形的数量是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/be1d11a2-c04a-46e6-b67d-dbbd41d64fe4.png?resizew=481)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/14/be1d11a2-c04a-46e6-b67d-dbbd41d64fe4.png?resizew=481)
A.2020 | B.3032 | C.2021 | D.3035 |
更新时间:2023-12-14 17:01:22
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【推荐1】观察图中正方形四个顶点所标的数字规律,可知,数2016应标在( )
![](https://img.xkw.com/dksih/QBM/2018/6/12/1965676332482560/1966989957521408/STEM/04d178acabbd455997c939f903a07ea2.png?resizew=399)
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C.第505个正方形的左上角 | D.第505个正方形的右下角 |
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【推荐2】对于每个正整数n,设f(n)表示n(n+1)的末位数字.例如:f(1)=2(1×2末位数字),f(2)=6(2×3的末位数字),f(3)=2(3×4的末位数字),……则f(1)+f(2)+f(3)+…+f(2016)的值是( )
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【推荐1】如图,
中,
,延长
到D,
与
的平分线相交于
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与
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与
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【推荐2】为庆祝“六
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