Horizontal steel tank lined with plastic hook from the top of the general set up.
卧式钢衬塑贮罐顶部一般设起吊钩。
Write an appropriately general set of functions that can draw shapes as in Figure 4.2.
写一系列的合适的函数组合，画出图4.2所示的形状。
Write an appropriately general set of functions that can draw flowers as in Figure 4.1.
写一系列的合适的函数组合，画出图4.1所示的花图案。
Write an appropriately general set of functions that can draw flowers as in Figure 4.1.
写一系列的合适的函数组合，画出图4.1所示的花图案。
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