首页
登录
职称英语
Today, most countries in the world have canals. Some canals, such as the Sue
Today, most countries in the world have canals. Some canals, such as the Sue
游客
2023-11-04
24
管理
问题
Today, most countries in the world have canals. Some canals, such as the Suez or the Panama,【C1】______ships weeks of time by making their voyage a thousand miles shorter. Other canals permit boats to reach cities that are not located on the coast.【C2】______other canals drain lands where there is too much water, help or【C3】______fields where there is not enough water.
The【C4】______of a canal depends on the kind of boats going through it. The canal must be wide enough to permit two of the【C5】______boats using it to【C6】______each other easily. It must be deep enough to leave about two feet of water【C7】______the keel of the largest boat using the canal. Some canals have sloping sides, while others have sides that are nearly【C8】______. Canals that are cut through rock can have nearly vertical sides. 【C9】______, canals with earth banks may【C10】______if the angle of their sides is too steep. Some canals are lined with brick, stone, or concrete to keep the water【C11】______soaking into the mud. This also permits ships to go at【C12】______speeds, since they cannot make the banks fall in by【C13】______up the water. In small canals with mud banks, ships and barges(大平底船)must【C14】______their speed.
When the canal goes【C15】______different levels of water, the ships must be【C16】______or lowered from one level to the other. This is generally done by【C17】______of locks. If a ship wants to go up to higher water, the lower end of the lock opens to let the boat in. Then this gate closes, and the water is let into the lock chamber from the upper level. This raised the level of the water in the lock【C18】______it is the same as the upper level of water. Now the upper gates can be opened to【C19】______the ship into the higher water. Sometimes a canal contains a series of locks when the【C20】______in levels is very great. [br] 【C10】
选项
A、collide
B、corrupt
C、crumble
D、deteriorate
答案
C
解析
空前讲河堤是土质的,由后面的条件句推理可知,这样的河堤容易坍塌、溃坝,故答案为[C]crumble“瓦解,崩溃”。[A]collide意为“碰撞”;[B]corrupt意为“腐蚀,堕落”;[D]deteriorate意为“恶化”。
转载请注明原文地址:https://tihaiku.com/zcyy/3156968.html
相关试题推荐
In1847mostcountriesoftheworldwere[br][originaltext]Anymistakemad
In1847mostcountriesoftheworldwere[originaltext]Anymistakemadeint
Today,mostcountriesintheworldhavecanals.Somecanals,suchastheSue
Today,mostcountriesintheworldhavecanals.Somecanals,suchastheSue
Today,mostcountriesintheworldhavecanals.Somecanals,suchastheSue
Today,mostcountriesintheworldhavecanals.Somecanals,suchastheSue
Today,mostcountriesintheworldhavecanals.Somecanals,suchastheSue
Today,mostcountriesintheworldhavecanals.Somecanals,suchastheSue
Today,mostcountriesintheworldhavecanals.Somecanals,suchastheSue
Today,mostcountriesintheworldhavecanals.Somecanals,suchastheSue
随机试题
ProfessorJohnsonissaid______somesignificantadvanceinhisresearchinthe
[originaltext]There’sbeenanotherdayofnegotiationinAlgierstotrytos
PASSAGETHREE[br]Whydoestheauthorsay"Todayhe’dbeasurvivor"?Becausehe
IntheUnitedStatesthefirstdaynurserywasopenedin1854.Nurserieswer
NewRulesforLandingaJob—Intervi
患儿8个月,男孩,因发热,腹泻稀水便1天于11月入院。体检:T39.5℃,P13
宫内置环后出现经量多于既往月经量,经色黯红,有血块,胸胁、乳房胀痛,嗳气口苦;舌
关于“合同服务”和“超值服务”的说法,正确的是()。A:合同服务是非强制性的
某水泥厂新建一条日产5000t新型干法水泥生产线,其中机电安装工程通过公开招
下述酶的激活剂特点有误的是A、使酶由无活性变为有活性 B、激活剂大多为金属阴离
最新回复
(
0
)