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
32
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/3771536.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
Whyiseverycompanysomuchinterestedintheprocessofcustomersatisfact
[originaltext]Hi,everyone!Theoldsayinggoes,"You’reonlyasyoungasy
Sheis______rudeandmean.Ireallycan’tunderstandwhyyou’refriendswithhe
A.原发性高血压 B.冠心病 C.二尖瓣狭窄 D.主动脉瓣关闭不全 E.
A.阳性预测值升高、阴性预测值升高 B.阳性预测值升高 C.阳性预测值降低
王某,男,52岁。两年来心中悸动不安,眩晕,胸闷痞满,渴不欲饮,恶心,流涎,舌淡
下列哪项不是肝硬化时肝功能受损的临床表现? A.血浆蛋白降低B.黄疸C.蜘
小额贷款公司对同一借款人的贷款余额不得超过小额贷款公司资本净额的()。A.5%
建设工程施工总承包企业依法将专业工程分包,关于工程质量责任承担的说法正确的是(
与热力管网闭式系统相比较,开式系统其热媒是被()消耗的。A.直接 B.间
最新回复
(
0
)