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
A、To Michigan. B、To China. C、To Maryland. D、To Canada. D短文说,钻孔虫向北扩散至Ontario,Canada。故D是正确答案。四个选项是地名,可猜测题目与地点有关。A和C是美国的州名,B和D是国家名,
A、To Michigan. B、To China. C、To Maryland. D、To Canada. D短文说,钻孔虫向北扩散至Ontario,Canada。故D是正确答案。四个选项是地名,可猜测题目与地点有关。A和C是美国的州名,B和D是国家名,
admin
2016-04-02
101
问题
A beetle invasion in the United States has killed at least twenty million ash trees. The invasion of the emerald ash borer was first discovered near Detroit, Michigan, in 2002. Experts believe the small green insects arrived in the 1990’s in shipments of goods from China.
The emerald ash borer has destroyed trees in the Midwest and as Far East in the United States as Maryland. [19]The insects have also spread as far north as Ontario, Canada.
Ash trees can resist many diseases. But they cannot resist the emerald ash borer. It lays eggs on the bark. The young larva drill into and feed on the inner bark. This harms the ability of the tree to transport water and nutrition.
In some places, farmers are using "detection trees". They have an area where bark has been cut away. The area circles the tree. The process weakens the tree. It makes them easier targets for borers, and shows if the insects are nearby.
Efforts to stop the spread of the emerald ash borer include cutting down affected trees. There are worries that the ash tree might disappear unless the invasion is controlled. To prepare for such a possibility, a government laboratory is asking people to send in the seeds from ash trees. [21]It examines and x-rays the seeds to make sure there are no living borer fertilized eggs. Only the best seeds are remained and then sent for storage in a seed bank. There, they are dried and frozen. Should the seeds ever be needed, the hope is that scientists might someday develop an ash tree that could resist the little green attackers.
19. How far do the insects spread northward?
20. Why is part of the bark cut away?
21. What is the government laboratory trying to do?
选项
A、To Michigan.
B、To China.
C、To Maryland.
D、To Canada.
答案
D
解析
短文说,钻孔虫向北扩散至Ontario,Canada。故D是正确答案。四个选项是地名,可猜测题目与地点有关。A和C是美国的州名,B和D是国家名,边听边做好笔记。解题的关键在于听清楚问题,就可以对号入座找出正确的答案了。
转载请注明原文地址:https://kaotiyun.com/show/EeL7777K
0
大学英语六级
相关试题推荐
Manycountrieshaveaholidaytocelebrateworkers’rightsonoraroundMay1,butLabourDayinCanadaiscelebratedonthefir
过去两千年,书法是最享有威望的一种艺术,它是用毛笔把中国语言的特点写在丝或者纸上。生于公元四世纪的书法家王羲之,虽然其作品没有保留,但仍被公认为最伟大的早期书法家之一。书法在前唐时期被认为是书画的一个分支,因长期与文人的迫求有关,所以在元朝时特别受人喜爱。
A、Shehasspentallthemoney.B、Sheworksinafactory.C、Sheshouldgetajob.D、Shelikestoargue.D细节题。选项与女士有关,涉及钱、工作以及女士的性
A、Itispartoftheirlocalheritage.B、Itisanattractionoftourists.C、Itistherevivalofmorals.D、Itisthemiracleof
A、Theystaycloseduntilsummercomes.B、Theycaterchieflytotourists.C、Theyarebusyalltheyearround.D、Theyprovidequal
A、Itwasmorerespected.B、Itwasusedbymorepeople.C、Itwasvandalizedbytourists.D、ItquicklydeterioratedagainafterLi
A、Itispartoftheirlocalheritage.B、Itisanattractionoftourists.C、Itistherevivalofmorals.D、ItisthemiracleofG
It’sperhapstheworld’smostfamousunderwaterattraction,immortalizedinfilmandinlegend:theTitanic.Butnowexpertssay
It’sperhapstheworld’smostfamousunderwaterattraction,immortalizedinfilmandinlegend:theTitanic.Butnowexpertssay
随机试题
应用价值工程进行价值分析时,关于分析对象选择的说法,正确的有()。
设想没有运动的物质必然导致()
原发性肺结核的特点包括
下列哪一项是衣原体的繁殖型
计算氮平衡时,排出氮不包括()。
前囟关闭的时间为( )个月
平胃散的组成药物不包括
张某在某商店看到一款名牌手表标价800元,觉得很划算,就买了,商店售出后发现,是营业员错将8000元标成了800元。商店找到张某要求他补足货款,张某予以拒绝,并称已口头允诺要将手表送给李某。于是,商场便将张某起诉至法院,张某接到传票后,撤销了与李某间的赠与
现实主义戏剧作家主要有()。
众所周知选择公共交通工具将有助于减少空气污染。
最新回复
(
0
)