首页
登录
职称英语
What happens during the natural growth of a tree each year? [originaltext] Du
What happens during the natural growth of a tree each year? [originaltext] Du
游客
2023-11-02
30
管理
问题
What happens during the natural growth of a tree each year?
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、Their rings become lighter in color.
B、They have one more ring of wood.
C、They become more precious.
D、Their rings get closer and closer.
答案
B
解析
细节题。文中指出每年树木都会长粗一圈,即会多一圈年轮,故B项意思正确。
转载请注明原文地址:https://tihaiku.com/zcyy/3150574.html
相关试题推荐
Angeristhenaturalreactionweexperiencewhenwefeelthreatenedor______.A、d
WeallknowthatMaryhashadastrict______.A、growthB、upbringingC、development
Duringthesummerholidayseasonitisdifficulttofinda(n)______roomintheh
Aestheticthoughtofadistinctivelymodernartemergedduringthe18thcent
Aestheticthoughtofadistinctivelymodernartemergedduringthe18thcent
Aestheticthoughtofadistinctivelymodernartemergedduringthe18thcent
Aestheticthoughtofadistinctivelymodernartemergedduringthe18thcent
Aestheticthoughtofadistinctivelymodernartemergedduringthe18thcent
Aestheticthoughtofadistinctivelymodernartemergedduringthe18thcent
Aestheticthoughtofadistinctivelymodernartemergedduringthe18thcent
随机试题
Decemberisoftenthemonththatpeoplespend,spend,spend.Now,withJanua
AreYouaSuccessfulLeader?TheSuccessfulLeadershi
Inhisrecentspeech,thechancellorwarnedagainstcomplacencytothestrength
下列哪条不属于室内设计的主要内容?()A.室内空间调整和再创造 B.地面、
在道路上发生交通事故,仅造成轻微财产损失,并且基本事实清楚的,当事人()。A.
照明设施实测项目中要测试照度及均匀度的场所有路段直线段、路段弯道段和()。A.
毛细支气管炎发病年龄最多见于A.新生儿 B.2个月以内的婴儿 C.2~6个月
2013—2020年,全国普通高校毕业生人数同比增速超过4%的年份有几个
甲集团是以肉类加工为主的大型食品集团,在全国18个省市建设了加工基地。集团旗下
在TN—C系统中,下列关于保护(PE)线和中性(N)线说明正确的是()。A.整
最新回复
(
0
)