下列这段代码召唤了几只画笔海龟库？import turtle pen = turtle.Pen() t = turtle.Pen() p = turtle.Pen() pen.pensize(5) pen.forward(100)

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下列这段代码召唤了几只画笔海龟库？

import turtle pen = turtle.Pen() t = turtle.Pen() p = turtle.Pen() pen.pensize(5) pen.forward(100)

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