首页
登录
职称英语
Canals are watercourses constructed to improve and extend natural waterways
Canals are watercourses constructed to improve and extend natural waterways
游客
2023-11-22
77
管理
问题
Canals are watercourses constructed to improve and extend natural waterways. They are generally built to facilitate transportation, but from the beginning they have been used for many additional purposes including draining swamps, irrigating land for cultivation, and promoting economic development.
Canals are often classified by the size of vessel they can accommodate. Some small local canals, which are able to float only 100 to 300 ton boats or small rafts of timber, may be only 3 feet deep. Major barge canals generally range from 6 to 9 feet in depth, and some are as much as 10 or 12 feet deep. These canals can carry 1,350 to 2,000 ton craft. Ship canals are 25 feet or more deep and are capable of accommodating large vessels in the seagoing class.
Canals may also be classified as either water level or lock canals. Water level canals do not vary in height along their courses. The best known of these is the Suez Canal, which is at sea level. Lock canals, which include most modem waterways, contain locks, or special devices for raising and lowering boats along their courses by changing the depth of the water. Each lock is a stretch of water enclosed by gates at each end. After a boat enters the lock, water is let or drained out until it reaches approximately the same level as the water ahead. [br] The second paragraph makes it clear that______.
选项
A、the Arthur story reflects a historical transition in human civilization
B、Arthur story is legendary and has no real life basis
C、Arthur story is greatly exaggerated and unbelievable
D、Arthur story reflects people’ s good expectations of their leaders
答案
A
解析
选项A的意思为:“亚瑟的故事反映了人类文明史上的一个历史转变。”第二段指出,从石头中拔出剑这个故事反映的是石器时代向青铜器时代的转变。青铜器的使用进一步解放了生产力,解放了人,因此,掌握了青铜提炼技术的人理所当然地成为具有神力的人,成为文化英雄(culture hero)。(注:青铜时代是石器时代后、铁器时代前的一个时代。)B意为:“亚瑟的故事是传奇,没有真实基础。”C意为:“亚瑟的故事被大大地夸大了,因此不可信。”D意为:”亚瑟的故事反映了人们对其领袖的良好期望。”
转载请注明原文地址:https://tihaiku.com/zcyy/3210708.html
相关试题推荐
Doingyourhomeworkisasurewaytoimproveyourtestscores,andthisisespec
Whatdoesthepassagemainlydiscuss?[originaltext]Canalsarewatercourses
Whousedtolivetogetherinanextendedfamily?[br][originaltext]Thefa
Whousedtolivetogetherinanextendedfamily?[br][originaltext]Thefa
Whousedtolivetogetherinanextendedfamily?[originaltext]Thefamilyi
Canalsarewatercoursesconstructedtoimproveandextendnaturalwaterways
NationalParkconservationiststhink______concessionstandsspoilthenaturalb
Theredspotsfirstappearedontheforearmandthenextended______totheshou
GermanhavelawmakersvotedtoextendandexpandtheroleofGermanpeacekeepers
GermanhavelawmakersvotedtoextendandexpandtheroleofGermanpeacekeepers
随机试题
IntheUS,pollafterpollhasshownamajorityinfavourofanimalexperimen
Technically,anysubstanceotherthanfoodthataltersourbodilyormental
Asmuchasmurderisastapleinmysterystories,soislove.Lovemaybeafo
悬臂梁在自由端受集中力P作用,横截面形状和力P的作用线如图所示,其中产生斜弯曲与
以下对居住区绿地规划基本要求的叙述中,哪一条是不正确的?()A.集中与分散相
碳化深度值测量时,使用适当的工具在测区表面形成深度大于混凝土碳化深度的洞。采用一
龋病最好发牙位是A.上颌第一磨牙 B.下颌第二磨牙 C.上颌第二磨牙 D.
一切生命活动都离不开蛋白质,蛋白质是生命活动的主要承担者。下列叙述中与蛋白质无关
《地铁设计规范》GB50157--2013规定:地下铁道隧道工程的防水设计,应根
患者,男性,67岁,反复咳嗽、咳痰30余年,心悸、气促、下肢间歇性水肿2年,病情
最新回复
(
0
)