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题目
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Is it a tree?Is it a bear?If you’re looking at a tree in the shape of a bear,it’s a topiary(林木雕塑).A topiary is a tree or a bush(灌木) that is trained into a shape.Growing a topiary garden takes both time and skills.
A topiary gardener should make a drawing first.The drawing shows the final shape that the gardener likes.The gardener then chooses a bush for the topiary.It may be one that just planted or one that is already in place.In June of the plant’s first year,the gardener looks for new leaves.When the leaves grow,it’s time to shape(给……造型) the bottom of the bush.It needs about five years.The top is not trimmed during this time.In the fifth year,the bush grows tall enough for shaping.Then the gardener begins to shape the whole bush.Once a topiary has been started,it needs care all year.In the summer it must be cut many times to keep its shape.This cutting also helps the bush grow.In the winter the bushes don’t grow.The gardeners have to brush snow of the plants,or snow may hu
答案
是要翻译哈~我试试啊~这是树?还是熊?如果你看到一个熊状的树,那么它是个林木雕塑了.一个林木雕塑是一棵树或者是一丛灌木被修剪成一个形状.建造一个林木雕塑的花园需要同时投入时间和技巧.一个林木雕塑园艺师必须首先...
举一反三
已知函数f(x)=x,g(x)=alnx,a∈R.若曲线y=f(x)与曲线y=g(x)相交,且在交点处有相同的切线,求a的值和该切线方程.
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