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
8
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
Agoodwaytogetinformationforessaysandreportsistointerviewpeople
AccordingtoastudyconductedbyChinaPopulationCommunicationCenter,75%
[originaltext]W:Hi,ProfessorHiggins.M:Hi,Julia.W:Wouldyoubeabletoh
按照商品出库凭证所列商品编号、产地、品名、规格、等级、单位、数量等项,做到准确无
防火墙通常分为内网、外网和DMZ三个区域,按照默认受保护程度,从低到高正确的排列
核酸的一级结构A.多核苷酸链中,氨基酸的排列顺序 B.多核苷酸链中,碱基的排列
数字化业务不具备的特点是()。A.运行环境开放 B.电子虚拟服务方式
Afteraday'sfiercefighting,theenemy
牛市套利对于可储存的并且作物年度相同的商品较为有效。( )
有垂直位移,但不能承受水平荷载的管道支架是( )支架。A.固定 B.滑动 C
最新回复
(
0
)