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
2024-09-19
28
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/3765144.html
相关试题推荐
Thenewsitemismainlyabout______.[br][originaltext](21)Recentdiscover
What’sthepercentofteenagerswhohadjobsin2000?[originaltext]Anewre
Whatisthespeakerdoing?[br][originaltext]Goodmorning,mynameisMars
Whatisthespeakerdoing?[br][originaltext]Goodmorning,mynameisMars
WhereisCharingCrossRoadlocated?[br][originaltext]Londonersaregreat
WhereisCharingCrossRoadlocated?[originaltext]Londonersaregreatreade
Whatisthepassagemainlyabout?[br][originaltext](12)Memory,theysay,
Whatwasthewomandoingatlunchtime?[br][originaltext]M:Hi,Janet.Wherew
What’sthepossiblerelationshipbetweenthetwospeakers?[br][originaltext]W
What’sthepossiblerelationshipbetweenthetwospeakers?[br][originaltext]W
随机试题
PassageOne[br]Whatdoestheauthormeanbysaying"hehadlivedcenturies"in
[originaltext]W:Idon’tthinkIwanttoliveinthedormitorynextyear.Inee
()售后服务()版权所有[br]()技术密集型()盗版商品O,H
Coupledwiththegrowingquantityofinformationisthedevelopmentoftechn
TheMonaLisaisshowingherage,museumcurators(馆长)inParissaidwhilea
脑出血最常见于A.蛛网膜下腔 B.脑桥 C.内囊 D.椎-基底动脉 E.
公司债券上市交易后,公司存在下列哪种情形,不符合证券交易所暂停其公司债券上市交易
某皮革厂一工人剥了一只死羊的皮后,手臂先出现了丘疹,次日疹顶部出现水疱,内含金黄
(12345+51234+23451+45123+34512)÷5的值等于
某商店衣服标明“正在出售”,并且标识了价格,则“正在出售”的标识不能视为( )
最新回复
(
0
)