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
专升本
It takes a long time to grow a tree. How long? Well, pine trees are the quickest growing trees, but still, they take twenty year
It takes a long time to grow a tree. How long? Well, pine trees are the quickest growing trees, but still, they take twenty year
admin
2013-12-10
29
问题
It takes a long time to grow a tree. How long? Well, pine trees are the quickest growing trees, but still, they take twenty years to reach a size suitable for cutting and harvesting. An oak takes about sixty years to grow to a good size. A redwood may take hundreds of years.
Lumber companies, which make their money on trees, depend on those that grow quickly.
Therefore
, they are always looking for methods to make trees grow faster. So far, the secret to fast growing trees seems to lie in " super-seeds. " These are seeds that are gathered from the quickest growing trees in a forest. One company searched 100,000 acres of trees and selected the seeds from just fifteen trees. These two ounces of seed were enough to plant several hundred new trees. Eventually, when these trees have grown, seeds will again be taken only from the fastest growing trees of crop. This process of artificial selection will yield, in the future, a super-tree that will grow in half the time it takes normal trees to develop.
Unfortunately, it takes a long time for a plan like this to reach its goal. The Weyerhauser Lumber Corporation, which started its first collection of seed in 1958, is just now beginning to harvest the super-seeds of the first generation of the faster growing trees.
The word "therefore" in paragraph 2 indicates that a______.
选项
A、speech is beginning
B、conclusion follows
C、comparison is being made
D、metaphor is being used
答案
B
解析
第二段。Therefore因此。由于前面提到的原因,才有了后面的行为或决定。这个词的前面通常是原因,该词后则通常是结果。选项B是正确的。
转载请注明原文地址:https://www.kaotiyun.com/show/qOeC777K
本试题收录于:
英语题库成考专升本分类
0
英语
成考专升本
相关试题推荐
报考英语专业的考生必做,非英语专业的考生不必做。Forthispartyouareallowed30minutestowriteacompositiononthetopic:MakeOurCitiesGreener.
Whenateacherorlecturerrecommendsastudenttoreadabook,itisusuallyforaparticularpurpose.Inmanyeases,theteach
Almosteveryfamilybuysatleastonecopyofanewspapereveryday,Somepeoplesubscribetoasmanyastwoorthreedifferent
Forthispart,youareallowed20minutestowriteashortcompositionofabout100-120wordsonthetitle:MyMostFavourite
Haveyou【61】askedyourselfwhychildrengotoschool?Youwillprobablesaythattheygo【62】theirownlanguageandotherlanguag
Haveyou【61】askedyourselfwhychildrengotoschool?Youwillprobablesaythattheygo【62】theirownlanguageandotherlanguag
Amongthequestionofdesign,construction,andoperationremainingtobesolvedbeforecommercialairlinerstravelfasterthan
Nooneknowshowmanlearnedtomakewords.Perhapshebeganbymakingsoundslikethosemadebyanimals.Perhapshegruntedlik
ItusedtotakeRedwoodCity,Californiapolicehourstolocategunfire.Now,theyhaveanewtoolthathelpsthemfindthegunf
Tomlookssopaletoday.He______ill.
随机试题
第三代喹诺酮类药物的抗菌机制是其抑制了细胞的
在工程单独承保责任保险中不包括()。
在建筑安装工程费的企业管理费中,包括()。
无论是对企业还是对员工而言,比较有益的工资安排顺序是在员工职业生涯的后期阶段工资实行()。
关于智力,以下说法正确的是()
painfuldistinguishinginevitablyA.buttheyarenotitsmost【T7】______featuresB.thepain【T8】______broughtbysuchth
违约责任的归责原则是()原则。
亚投行
2022年2月,国务院批复同意在鄂尔多斯市、扬州市、阿拉山口市等()个城市和地区设立跨境电子商务综合试验区。
关于UML的静态建模机制,下述说法错误的是______。
最新回复
(
0
)