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用一支笔怎样才能在一张纸上一笔画出两条线?
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对折啊,然后错开一点,画一条直线,就变成了正反两面各一条
看用什么笔了,铅笔的话两头都削了,把纸折成水槽状,一笔两线; 也可以把铅笔尖分成两部分; 把纸折一下,然后画过去;
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along
额
wwww
111
11
Arron
1
adai
0.0