高考的英语阅读训练
来源:才华咖 本文已影响2.85W人
来源:才华咖 本文已影响2.85W人
Trees should only be pruned(修剪) when there is a good and clear reason fordoing so and, fortunately, the number of such reasons is small. Pruning involves the 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 tree to grow in its own way.
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 cur 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.
One result of pruning is that an open would 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, or that there is a period when the tree is at risk. It should be the aim of every gardener to reduce the risk as far as possible. It is essential to make the area which has been pruned smooth and clean, for healing will be slowed down by roughness. You should allow the cut surface to dry for a few hours and then paint it with one of the substances available from garden shops produced especially for this purpose. Pruning is usually done in winter, for then you can see the shape of the tree clearly without the interference(干扰) from the leaves and it is, too, very unlikely that the cuts you make will bleed. If this does happen, it is, of course, impossible to paint them properly.
新初三暑假英语拔高训练阅读理解训练
高考文言文阅读训练20篇
高考英语阅读考前提升训练 网络时代
高考英语阅读训练题 海洋资源
高考文言文阅读训练
高考英语必备阅读训练(043)
2017年高考英语阅读理解考前训练
高考英语阅读训练试题及答案
高考英语阅读提升训练 财富人生
高考英语阅读理解训练题及答案
高考英语阅读提升训练 医学常识
关于高考英语阅读训练的优秀文章
高考英语阅读理解提升训练附参考答案
高考英语阅读理解训练及答案
高考英语阅读理解训练及参考答案
2017高考英语阅读理解训练
高考英语阅读训练
高考英语阅读理解专项训练
高考英语时态练习题
高考英语阅读题训练及参考答案
高考英语阅读训练题目及答案
高考英语阅读提升训练 出国留学
高考英语阅读训练和答案及解析
高考英语考试前阅读理解训练题
高级商务英语考试阅读理解考点训练