更多"用草坪修剪机修剪草坪时，草株太高超过12cm时，应一次性修剪到规定高度"的相关试题:
[判断题]用草坪修剪机修理草坪时，草株太高超过12厘米时，应一次日性修剪到规定高度，切忌二次修剪，以免造成不整齐。
[单项选择]广告：市场上大部分电动树篱修剪机在修剪树篱时都可以发挥适当的功效，但许多修剪机的操作是危险的，未经训练的操作者可能会受到严重伤害。H公司生产的修剪机曾由国立实验室检测，这是在安全检测方面最权威和最让人信任的实验室。因此你知道，如果你买了H公司的电动树篱修剪机，你就是买了安全最有保证的产品。
对以下哪个问题的回答最有助于评估上述广告结论的真实性？（）
A. 国立实验室对H公司生产的其他产品进行过检测吗
B. 操作的安全性对购买电动树篱修剪机的普通人来说有多么重要
C. 国立实验室对H公司生产的树篱修剪机检测的结果如何
D. 是否有比用电动树篱修剪机更安全的修剪树篱的方法
E. 市场上出售的其他电动树篱修剪机有没有比H公司的树篱修剪机更好用的
[判断题]用修剪命令修剪对象，可以使它们精确地终止于指定的剪切边。( )
[单项选择]
H
Trees should only be pruned (修剪) when there is a good and clear reason for doing so and, fortunately, the number of such reasons is small. Pruning involves cutting away of overgrown and unwanted branches, and the inexperienced gardener can be encouraged by the thought that more damage results from doing it unnecessarily than from leaving the trees to grow in their own ways.
First, pruning may be done to make sure that trees have a desired shape or size. The object may be to get a tree of the right height, and at the same time to help the growth of small side branches which will thicken its appearance or give it a special shape. Secondly, pruning may be done to make the tree healthier. You may cut out diseased or dead wood, or branches that are rubbing against each other and thus causing wounds. The health of a tree may be encouraged by removing the branches that are locking up the centre and so preventing the free movement of air.<
A. Because it can make trees grow taller.
B. Because it can improve the shape of the trees.
C. Because it can get rid of the small ranches.
D. Because it can make the small branches thicker.
[简答题]整形式绿篱进行修剪时应当注意哪些方面的问题
[单项选择]Trees should only be pruned (修剪) when there is a good reason for doing so. Many gardeners believe that more damage results from doing it unnecessarily than from leaving the tree to grow in its own way.
First, pruning may be done to make sure that trees have a desired shape. The object may be to get a tree of the right height, and to help the growth of small side branches which will thicken its appearance or give it a special shape. Secondly, pruning may be done to make the tree healthier. You may cut out diseased or dead wood, or branches that are rubbing against each other and thus causing wounds. A tree may grow healthier by removing the branches that are locking up the centre and so preventing the free movement of air.
One result of pruning is that an open wound is left on the tree and this provides an easy entry (进入) for diseases, but it is a wound that will heal. Often there is a race between the healing and the disease as to whether the tree will live or die. Pruning is
A. the cut surface can heal more quickly
B. open wounds on the tree run the less risk of getting diseased
C. a gardener can do pruning more easily
D. the leaves can interfere
