首页
登录
职称英语
What happens during the natural growth of a tree each year? [br] [originaltext]
What happens during the natural growth of a tree each year? [br] [originaltext]
游客
2023-11-07
31
管理
问题
What happens during the natural growth of a tree each year? [br]
During this century, archaeologists have discovered that trees can be a valuable tool for measuring time. In scientific terms, this method is called dendrochronology. Dendrochronology is based on the scientific discovery that each year a tree grows a new layer of wood. When you cut down a tree, for example, you can see and count the layers of concentric circles. The layers vary in color and in thickness. These variations are a result of differing climate conditions from year to year that affects the growth of the annual rings. Cold weather, for example, creates thinner and lighter rings while hot weather produces thicker and darker rings. All trees that grow in the same region will have roughly the same pattern of annual rings, and this can be used as a source of comparison and measurement. Early in this century, archaeologists began using the rings to date ruined structures and figures built in the southwestern United States. They did this by comparing the rings of the wood found in the ruins with the rings of recently cut trees. Slowly but surely, the system was extended backwards in time to measure older ruins. The heavy forestry of the United States, coupled with the relative youth of its history, led to a fairly uncomplicated study.
选项
A、They can measure constructions.
B、It helps them study past society.
C、It provides a time tracing procedure.
D、They can build more buildings.
答案
C
解析
细节归纳题。文中介绍考古学家利用树木的年轮来推断美国西南部的一些遗迹的年代,故C项表意正确。
转载请注明原文地址:https://tihaiku.com/zcyy/3167176.html
相关试题推荐
NahumAcostawasaccusedof______.[br][originaltext]Aformeraidetoth
______,LaborParty’smajoritywasreducedintheParliament.[originaltext]P
TheFlowerAuctionislocatedontheoutskirtsof______.[br][originaltext]
Themainstructureofanuclearfamilyconsistsof[br][originaltext]The
Whatisthespeaker’sfieldofstudy?[br][originaltext]I’mcurrentlystu
Whatisthespeaker’sfieldofstudy?[originaltext]I’mcurrentlystudying
Whatdothespeakersmainlydiscuss?[br][originaltext]M:Hello,Mrs.Kelly.
Whatdothespeakersmainlydiscuss?[br][originaltext]M:Hello,Mrs.Kelly.
Whatisthemainsubjectofthedebate?[br][originaltext]M:Wearehavingad
Whatisthemainsubjectofthedebate?[originaltext]M:Wearehavingadebate
随机试题
Nowadays,airtravelisvery【C1】______.Wearenotsurprisedwhenwewatcho
WilliamFaulknerwasborninOxford,Miss.Hehad【1】_______edu-【1】_
Standingbesidethedesk______.A、thesecretarywasB、didthesecretarybeC、was
某工程位于地震区,抗震设防烈度为8度,I类场地土,是丙类建筑。该工程为框架结构,
下列关于标准节流装置的叙述,错误的是( )。A.适合测量临界流 B.流体
幼儿园环境创设的原则有( )。A.环境与教育目标的一致性原则 B.发展适宜性
中央银行在履行其基本职责时,能够作为货币政策中间目标的变量通常应符合(
金融衍生品市场上有不同类型的交易主体。如果某主体利用两个不同黄金期货市场的价格差
(2017年真题)采用相关图法分析工程质量时,散布点形成由左向右向下的一条直线带
下列费用中,属于建设工程静态投资部分的是()。A.基本预备费 B.涨价预备费
最新回复
(
0
)