2017年四级阅读理解模拟练习试题及答案
学习专看文学书,也是不好的。先前的.文学青年,往往厌恶数学、理化、史地、生物学,以为这些都无足轻重,后来变成连常识也没有。以下是小编为大家搜索整理的2017年四级阅读理解模拟练习试题及答案,希望能给大家带来帮助!更多精彩内容请及时关注我们应届毕业生考试网!
Trees should only be pruned when there is a good and clear reason for doing so and , fortunately,the number of such reasons is small. Pruning involves the cutting away of obergrown 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 cut diseaed or dead wood, or branches that are rubbing against each other and thus cause wounds. The health of a tree may be encouraged by removing branches that are blocking 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 for disease, but itis a wound that will heal. Often there is a race between the healing and the desease as to whether the tree will live or die, so that there is a period when the tree is at risk. It should be the aim of every gardener to reduce 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 hurs and then paint it with one of the substances available from garden shops produced especially for this purpose. Pruning is usually without interference from the leaves and also it is very unlikely that the cuts yu make will bleed. If this does happen,it is, of course,impossible to paint them properly.
ing should be done to ______.
the tree grow taller
ove the shape of the tree
rid of the small branches
the small branches thicker
s become unhealthy if the gardener ______.
ws too many branches to grow in the middle
not protect them from wind
es them to grow too quickly
ges some of the small side branches
is a special substance painted on the tree?
make a wound smooth
prevent disease entering a wound
cover a rough surface
help a wound to dry
4.A good gardener prunes a tree______.
intervals throughout the year
quickly as possible
sionally when necessary
lar every winter
was the author's purpose when writing this passage?
give pratical instruction for pruning a tree.
give a general description of pruning
explain how trees develop diseases
discuss different methods of pruning.
答案:b a b c a
-
英语四级口语考试常用词汇230句
本文为大家整理出了大学英语四级口语考试常用词汇,希望大家多练习口语,提高口语对话能力,在口语考试中取得理想的成绩,以下是小编收集整理的英语四级口语考试常用词汇,欢迎大家借鉴与参考,希望对大家有所帮助。1、takearaincheck延期2、lostcount弄不清楚3、beinano...
-
读书英语四级作文范文(通用13篇)
在学习、工作、生活中,说到作文,大家肯定都不陌生吧,作文是经过人的思想考虑和语言组织,通过文字来表达一个主题意义的`记叙方法。一篇什么样的作文才能称之为优秀作文呢?下面是小编精心整理的读书英语四级作文范文,欢迎阅读与收藏。读书英语四级作文篇1Lifeisajourn...
-
大学英语四级听力原文(精选12篇)
无论在学习、工作或是生活中,大家都尝试过写作文吧,借助作文人们可以实现文化交流的目的。相信很多朋友都对写作文感到非常苦恼吧,下面是小编整理的大学英语四级听力原文,仅供参考,大家一起来看看吧。大学英语四级听力原文1Asthenewsalesdirectorforanationalcomput...
-
2023年6月英语四级考试听力集训试题
现如今,我们经常跟试题打交道,试题可以帮助参考者清楚地认识自己的知识掌握程度。你知道什么样的试题才是好试题吗?以下是小编帮大家整理的2023年6月英语四级考试听力集训试题,希望能够帮助到大家。SectionA1.M:TheDeanjustannouncedthatDr.Holden'sgoingI'...