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
2023-11-02
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://www.tihaiku.com/zcyy/3150576.html
相关试题推荐
InwhatrespectistheUnitedStatesveryfortunate?[br][originaltext]The
InwhatrespectistheUnitedStatesveryfortunate?[br][originaltext]The
ThespeakercomparestheInternetto[br][originaltext]TheInternetisag
ThespeakercomparestheInternetto[originaltext]TheInternetisaglobal
WhyisgreenlivingencouragedinlocalcouncilsinBritain?[br][originaltext
WhyisgreenlivingencouragedinlocalcouncilsinBritain?[br][originaltext
WhyisgreenlivingencouragedinlocalcouncilsinBritain?[originaltext]W
WherearetheOlympicGamesheld?[br][originaltext]TheOlympicGamesare
WhoboughtBuckinghamHouse?[br][originaltext]BuckinghamPalaceisthemo
WhoboughtBuckinghamHouse?[originaltext]BuckinghamPalaceisthemonarch’
随机试题
Onacertainnumberline,if8isdistanceof18fromn,and17ishedistanceo
CommonFaultsandEyeMovementThereareanum
Oneshouldalwayskeepinmindtheoldtruth"Firstimpressionsarelasting".A、人
下列选项中不属于烧结机主要危险有害因素的是( )。A.煤气泄漏中毒的危险 B
下列腰2脊髓损伤的临床表现,错误的是A.髂腰肌及缝匠肌肌力减弱,下肢其余肌肉瘫痪
根据《旅行社条例》规定,申请设立旅行社经营国内旅游业务和入境旅游业务的,应具备(
2017年1—4月,T地区批发和零售业商品销售总额为15220亿元,同比增长10
( )量表中首先使用了智力年龄的概念A.比纳-西蒙 B.斯坦福-比纳 C.
某企业2015年度发行债券融资,每张债券面值100元,票面利率8%,期限5年,发
经济持续增长的最根本源泉是()。A.劳动增加 B.资本投入 C.技术进步
最新回复
(
0
)