首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Saving the juniper plant Background Juniper was one of the first plants to colonise Britain after the last【L31】________ Its smok
Saving the juniper plant Background Juniper was one of the first plants to colonise Britain after the last【L31】________ Its smok
admin
2022-09-09
30
问题
Saving the juniper plant
Background
Juniper was one of the first plants to colonise Britain after the last【L31】________
Its smoke is virtually【L32】________, so juniper wood was used as fuel in illegal activities.
Oils from the plant were used to prevent【L33】________spreading.
Nowadays, its berries are widely used to【L34】________food and drink.
Ecology
Juniper plants also【L35】________several species of insects and fungus.
Problems
In current juniper populations, ratios of the【L36】________are poor.
Many of the bushes in each group are of the same age, so【L37】________of whole populations is rapid.
Solutions
Plantlife is trialling novel techniques across【L38】________areas of England.
One measure is to introduce【L39】________for seedlings.
A further step is to plant【L40】________from healthy bushes.
【L31】
For my presentation, I’m going to summarise what I’ve found out about efforts to save one plant species... the juniper bush. It once flourished in Britain and throughout the world’s temperate zones, but over the last few decades has declined considerably. Before I go on to explain the steps being taken to save it in England, let me start by looking at some background information and why the juniper has been so important in cultural as well as ecological terms, historically and in the present day .
Firstly, I want to emphasise the fact that juniper is a very ancient plant. It has been discovered that
it was actually amongst the first species of plants to establish itself in Britain in the period following the most recent Ice Age
. And, as I say, it has a much valued place in British culture. It was used widely as a fuel during the Middle Ages because, when burnt,
the smoke given off is all but invisible
and so any illicit activities involving fire could go on without being detected, for example, cooking game hunted illegally. It also has valuable medicinal properties. Particularly during large epidemics,
oils were extracted from the juniper wood and sprayed in the air to try to prevent the spread of infection in hospital wards
. And these days, perhaps its most well-known use is in cuisine... cooking,
where its berries are a much-valued ingredient, used to flavour a variety of meat dishes and also drinks
.
Turning now to ecological issues, juniper bushes play an important role in supporting other living things
. If juniper bushes are wiped out, this would radically affect many different insects and also fungus species. We simply cannot afford to let this species die out.
So, why is the juniper plant declining at such a rapid rate? Well, a survey conducted in the north and west of Britain in two thousand and four to five showed that a major problem is the fact that in present-day populations,
ratios between the sexes are unbalanced
and without a proper mix of male and female, bushes don’t get pollinated. Also, the survey found that in a lot of these populations, the plants are the same age, so this means that bushes grow old and start to die at similar times...
leading to swift extinction of whole populations
.
Now, the charity Plantlife is trying to do something to halt the decline in juniper species. It’s currently trying out two new major salvage techniques,
this time focusing on lowland regions of England
. The first thing it’s trying is to
provide shelters for the seedlings
in areas where juniper populations are fairly well established. These, of course, are designed to help protect the plants at their most vulnerable stage. A further measure is that in areas where colonies have all but died out,
numbers are being bolstered by the planting of cuttings
which have been taken from healthy bushes elsewhere.
Now, I hope I’ve given a clear picture of the problems facing this culturally and ecologically valuable plant and of the measures being taken by Plantlife to tackle them. If anyone has any questions, I’d be happy to...
选项
答案
ice age
解析
录音原文的following the most recent“紧跟着最近的……”是对题目中after the last“在最后的…之后”的同义表述。
转载请注明原文地址:https://kaotiyun.com/show/rmnD777K
本试题收录于:
雅思听力题库雅思(IELTS)分类
0
雅思听力
雅思(IELTS)
相关试题推荐
待排序的关键码序列为(15,20,9,30,67,65,45,90),要按关键码值递增的顺序排序,采取简单选择排序法,第一趟排序后关键码15被放到第()个位置。
给定程序MODI1.C中函数fun的功能是:将p所指字符串中的所有字符复制到b中,要求每复制三个字符之后插入一个空格。例如,在调用fun函数之前给a输入字符串:ABCDEFGHIJK,调用函数之后,字符数组b中的内容则为:ABCDEFGHI
以下能正确表述算式sin(2πr+30°)的C语言表达式是()。
考生文件夹下有一个数据库文件“samp2.accdb”,其中存在已经设计好的表对象“tCollect”、“tpress”和“tType”,请按以下要求完成设计:创建一个查询,对“tType”表进行调整,将“类型ID”等于“05”的记录中的“类型介绍”字
数据库中有“商品”表如下:执行SQL命令:SELECT*FROM商品WHERE单价BETWEEN3000AND10000;查询结果的记录数是()。
Travellingcanbeawonderfuladventure.Travellingbyairplane,however,canbeverytiring.Thefollowing【K1】________(be)s
WhichTWOthingsdoesJeromeadviseDaisytodointhefirstmonthoftutorials?ASeehertutoreveryweek.BReviewall
ThetutoradvisesCassieandDevinnotto________
MemoTo:Peter,DeputyEditorFrom:DanielThomas,Editor-in-chiefDate:June6,2018Subject:EnsuringsmoothpublicationofJu
A、Manyofthemfinditratherdifficulttomanage.B、Theyhavenotseenasmuchdiversityasdesired.C、Manyofthemhaveaninc
随机试题
规定违法吊销许可证和执照、责令停产停业造成损害的,赔偿停产停业期间必要的经常性费用开支。所谓“必要的经常性”的费用开支包括()。
计算机的三类总线中,不包括__________。()
A.血pH7.20,BE+9.0mmol/LB.血pH7.15,BE-9.0mmol/LC.血浆渗透压>310mmol/LD.血浆渗透压>320mmol/LE.血pH7.40,血浆渗透压290mmol/L糖尿病酮症酸中毒
与图像重建有关的器件是
属于主观方面的健康资料是( )
评价采集气溶胶的采样效率时有两种表示方法,目前大气监测中一般采用
A.风水泛滥B.湿毒浸淫C.水湿浸渍D.湿热壅盛E.脾阳虚衰患者水肿日久,腰以下肿甚,按之凹陷不起,畏寒肢冷,尿少,舌淡苔白滑,脉沉弱。其证候是()
十进制数字32的BCD码为()。
甲、乙两人射击,若命中甲得4分,乙得5分;若不中,甲失2分,乙失3分,每人各射击10发,共命中14发,甲比乙多10分,甲、乙命中发数为()。
IonceaskedadvertisinglegendCarlAllywhatmakesthecreativepersontick.Ally【C1】res______,"Thecreativepersonwantsto
最新回复
(
0
)