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
2024-10-31
4
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/3825276.html
相关试题推荐
NationalParkconservationiststhink______concessionstandsspoilthenaturalb
AsIregardit,youcanwidenthe______oftheseimprovementsthroughyouracti
GermanhavelawmakersvotedtoextendandexpandtheroleofGermanpeacekeepers
Canalsarewatercoursesconstructedtoimproveandextendnaturalwaterways
Canalsarewatercoursesconstructedtoimproveandextendnaturalwaterways
Acompleteinvestigationintotheaccidentshouldleadtoimprovedstandardsand
Ourape-menforefathershadnoobviousnaturalweaponsinthestruggleforsu
Ourape-menforefathershadnoobviousnaturalweaponsinthestruggleforsu
Ourape-menforefathershadnoobviousnaturalweaponsinthestruggleforsu
Ourape-menforefathershadnoobviousnaturalweaponsinthestruggleforsu
随机试题
Allofthis______,shestillholdstheideathatthedevelopmentoftheInternet
There’sNoPlaceLikeHome[A]Onalmostanynightoftheweek,
依照《建设项目环境影响评价分类管理名录》的分类,说法错误的是()A.公路建设项
有爆炸危险的厂房、仓库采取有效的防爆措施。下列措施符合要求的是()。A.
确定公共建筑通道的宽度与长度的主要因素有()。Ⅰ.功能需要 Ⅱ.防火要求 Ⅲ
A.吉兰-巴雷综合征 B.急性脊髓炎 C.脑白质营养不良 D.急性小脑共济
食品营养标签由哪两部分构成?
阻塞性黄疸为A.脓血便 B.鲜血便 C.柏油样便 D.灰白色便
下列关于平台脚手板铺设的说法正确的是( )。A.脚手板应满铺,与墙面距离不得大
下列关于资源优化的说法中,正确的是()。A.资源优化的目的是尽量减少资源用
最新回复
(
0
)