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
31
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] 【C7】
选项
A、down
B、beneath
C、above
D、below
答案
B
解析
根据常识可知,当船在运河里航行时,船身下必须有一定高度的水,只有[B]beneath“在…下面”符合语义。[A]down作介词讲时,意为“沿着…往下”;[C]above“在…之上”;[D]below“在…下面”,用于两个物体没有接触面的情况下。
转载请注明原文地址:http://tihaiku.com/zcyy/3771533.html
相关试题推荐
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
Today,mostcountriesintheworldhavecanals.Somecanals,suchastheSue
随机试题
Nooneknowshowmanlearnedtomakewords.Perhapshebeganbymakingsound
TheThree-YearSolutionA)HartwickCollege,asmalllibe
《中华人民共和国国防法》规定,( )、中国人民武装警察部队在规定岗位实行文职人
下列关于各类建筑防火构造的说明中,错误的是( )。A.剧院舞台口上部与观众厅闷
设备运杂费通常的构成不包括()。A.运费和装卸费 B.包装费 C.废品损
男性,36岁。黏液脓血便1年,无发热,常伴里急后重。查体:左下腹轻压痛,未触及包
治疗腋痈选用的治法是A、清热解毒 B、清热利湿解毒 C、散风清热,化痰消肿
截至2011年底,浙江省社会组织吸纳社会各类人员就业人数约为:() A.2
关于氨基糖苷类抗生素叙述错误的是A.氨基糖苷类抗生素是由氨基糖(单糖或双糖)与氨
男性,48岁,乙型肝炎病史10年,因乏力,低热、腹胀、少尿来院就诊,检查发现巩膜
最新回复
(
0
)