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 Asia. C、To Maryland. D、To Canada. D四个选项均是地名,可猜测题目与地点有关。短文说,白蜡虫向北扩散奎Ontario,Canada。故D是正确答案。A说的Michigan是美国首次发现
A、To Michigan. B、To Asia. C、To Maryland. D、To Canada. D四个选项均是地名,可猜测题目与地点有关。短文说,白蜡虫向北扩散奎Ontario,Canada。故D是正确答案。A说的Michigan是美国首次发现
admin
2018-05-08
33
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.[9]Experts believe the small green insects arrived in the 1990’s in shipments of goods from East Asia.
The emerald ash borer has destroyed trees in the Midwest and as Far East in the United States as Maryland. 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, fanners 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.[12]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.
9. How did the emerald ash borers go to the United States according to experts?
10. How far do the insects spread northward?
11. Why is part of the bark cut away?
12. What is the government laboratory trying to do?
选项
A、To Michigan.
B、To Asia.
C、To Maryland.
D、To Canada.
答案
D
解析
四个选项均是地名,可猜测题目与地点有关。短文说,白蜡虫向北扩散奎Ontario,Canada。故D是正确答案。A说的Michigan是美国首次发现这种昆虫的地方,B中的Asia是该昆虫的来源地,C说的Maryland是美国东部遭受虫害的其中一个州,皆非题目所问。
转载请注明原文地址:https://kaotiyun.com/show/TuT7777K
0
大学英语六级
相关试题推荐
Astudyofnearly140,000womenintheU.S.showedthatregularhelpingsofasmallportionofnutscanhaveapowerfulprotect
It’sTimetoPayAttentiontoSleep,theNewHealthFrontierA)Yourdoctorcouldsoonbeprescribingcrucialsleepastreatment
A、Europe.B、TheCaribbeanislands.C、Canada.D、Mexico.D由“ThecornthatColumbusin—troducedtoEuropewasthedistantdescenden
A、BecauseGoldiecaresaboutbeauty.B、BecauseMialikesengineering.C、Becauseitisagiftfromgrandma.D、Becausetherearev
A、Bycoach.B、Bybus.C、Bycar.D、Bytrain.C由选项可知,此题考查使用某个交通工具。因此听音重点应放在它们之间的比较上。短文提到自行驾车前往是最好的选择,而且该购物中心提供12000个免费停车位,可推断C是最佳
A、Enteringalargecompanywithoutapplication.B、Programminghumanfeelingsintomachines.C、Decidingone’sbestpartnerthroug
Thehumannoseisanunderratedtool.Humansareoftenthoughttobeinsensitivesmellerscomparedwithanimals,butthisislar
A、Justletyougo.B、Offeralowerprice.C、Apologizetoyou.D、Trytoretainyou.D讲座中提到,不幸的是,很多公司都不能作出这样的决定,从而让你投向他们的竞争者。
GermanChancellor(首相)OttoVonBismarckmaybemostfamousforhismilitaryanddiplomatictalent,buthislegacy(遗产)includesman
A、Eliminatingtheoriginalvegetationfromthebuildingsite.B、Makingthehousesinanareasimilartooneanother.C、Deciding
随机试题
关于我国涉外民事诉讼代理问题,下列说法错误的是()
决定社会经济制度性质的是【】
患者男性,头部外伤后2小时入院,伤后曾昏迷约30分钟。入院查体:意识清楚,GCS评分:10分,头顶有一头皮血肿约3cm×3cm,头皮无明显裂伤。左侧外耳道可见稀薄血性液体流出。CT:左颞可见一线形骨折,左额颞可见一薄层硬膜下血肿,左颞点、片状高密度,颅内可
患者李某,女性,17岁。半年来因学习紧张,思想压力较大,晚上经常难以入睡,或多梦易醒,伴心悸健忘,四肢倦怠,饮食乏味,面色少华,舌质淡,脉细弱。其治疗应首选的方剂是
审判长在法庭审理过程中突发心脏病,无法继续参与审判,需在庭外另行指派其他审判人员参加审判。法院院长的下列哪一做法是正确的?(2011—卷二—32,单)
防排烟系统中,排烟风管的隔热层应采用厚度不小于()的不燃绝热材料。
()类贷款不属于不良贷款。
某外国投资者拟在中国境内出资设立一家外商独资企业。根据涉外投资法律制度的规定,下列各项中,可以作为该外国投资者出资方式的有()。
激励的目的是追求利润的最大化和建立一个具有凝聚力的团队来吸引并留下优秀的人才。但包容与信任作为一个并不深刻的激励手段,为什么往往被人们所忽视呢?这种现象很大程度上是人们对人性的曲解,美其名日人是贪婪的、自私的。因此,更多的人往往不愿往更深处去开采、去挖掘。
A、HeisTracieHiggins’sboyfriend.B、Heisabadboy.C、HebecomesverywelcomebywomenwithTrade’shelp.D、Heisalwayspopu
最新回复
(
0
)