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
2024-09-24
7
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] 【C5】
选项
A、largest
B、longest
C、heaviest
D、tallest
答案
A
解析
空前是说运河必须wide enough,宽度对应的应该是船只的大小,而不是高低、长短或轻重,由此可推断这里应该是表示可以允许两艘最大的船只很容易地通过,故答案为[A]largest。下句中的largest验证了答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3771531.html
相关试题推荐
Aseriesofborderincidentswould______leadthetwocountriestowar.A、inevitab
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
Today,mostcountriesintheworldhavecanals.Somecanals,suchastheSue
随机试题
Rumorshaveswirledforyearsaboutthemysticalphone,whichFacebookintro
First,ofcourse,itisplainthatinafewyearseveryonewillhaveathis
ThehomeserviceindustryinBeijingisexpectedtobecomemoreattractiveb
职业伦理法典的特征包括( )。A.可操作性 B.强制性 C.包容性 D.
建筑夜景照明时,下列哪类区城中建筑立面不应设置夜景照明?( )A.E1区 B
某公司中标一住宅小区,工程价1600万元,甲方预付25%的预付备料款。合同规定,
下列各项,不是急性白血病完全缓解的指标的是A.Hb≥100g/L(男性)或≥90
按照《企业国有资产监督管理条例》的规定,我国由()代表国家履行出资人职责。
通常情况下,商业银行需要保有的最低资本量是()。A.商业银行经济资本 B.商业
A.近曲小管上皮严重脂肪变性 B.系膜细胞及系膜基质弥漫增生 C.毛细血管袢
最新回复
(
0
)