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
2016-04-03
44
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. 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/NsG7777K
0
大学英语六级
相关试题推荐
Iamoneofthemanycitypeoplewhoarealwayssayingthatgiventhechoiceweshouldprefertoliveinthecountryawayfromt
Athirdofofficeworkerswouldrathergrabafewminutes【C1】______sleepthanbreakfast,accordingtoasurveythatestimatedpo
AccompanyingIndia’sindustrialtransformationhasbeenanotherrevolutionofprofoundsignificance.Aproperty-owningmiddlecl
MyViewonNEET1.目前,在中国的农村和城市都有“啃老族’’2.这种现象产生的原因3.如何应对这种现象注:“NEET”是“NotCurrentlyEngagedinEducation,Employmen
A、Hedidn’tlikeitatall.B、Hedidn’tthinkmuchofit.C、Helikedsomepartofit.D、Heenjoyeditasawhole.D对话中女士问男士对贾斯汀(
SevenStepstoaMoreFulfillingJobA)Manypeopletodayfindthemselvesinunfulfillingworksituations.Infact,oneinfourw
A、Theysmiletocoverembarrassment.B、Itisanunusualandevensuspiciousbehavior.C、Theysmiletoshowpoliteness.D、Itisa
A、Onlythreedays.B、SaturdayandSunday.C、Onlyoneday.D、Throughouttheweek.D细节题。文章中明确指出在美国,农场主们整个星期都会待在农场里。
A、Thefuelischeap.B、Theycanbestoppedandreignite.C、Theyarecheaptobuild.D、Theymustbeusedsoonafterfueling.C细节题
A、Thewomanwillhelpthemanmakeachoice.B、Themanisgoingtoattendajobinterview.C、Themanisintheprocessofjobhu
随机试题
社会主义精神文明建设的性质和方向取决于()
磺酰脲类药物能有效治疗糖尿病的作用机制是
沟固位形固位沟的深度一般为
静脉注射甘露醇引起尿量增加是通过
如果政府采取强有力的宏观搁控政策,紧缩银根,企业的投资和经营会受到影响,盈利下降,证券市场市值就可能缩水。()
企业采取保守型营运资本投资政策,产生的结果是()。
自春节开始,微博打拐如火如荼,成为一场公民行动,也得到公安机关的高度认可;另一方面,微博打拐也频现乌龙,冤枉好人。享受权利的代价是容忍他人正当行使权利时给自己带来的某些不便,这是现代公民应有的权利常识。打击拐卖儿童这种社会危害极大的犯罪行为,是每个社会成员
关于我国2018年公布的《行政区划管理条例》,下列说法正确的是:
1935年1月15日至17日召开的遵义会议集中解决了()
A、 B、 C、 D、 A
最新回复
(
0
)