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
20
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:https://tihaiku.com/zcyy/3156965.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
[audioFiles]audio_eusm_j01_176(20099)[/audioFiles]A、He’llgivethequizatala
GirlShootsInstructor,FuelingGunDebateOnAugust25,anAmericanfamily’s
建筑物基础的埋深,指的是()。A.从+0.00到基础底面的垂直距离 B.从室外
下列关于资产负债率的说法,错误的是()。A、资产负债率是使用频率最高的债务比率
采用热压灭菌法,用什么蒸气灭菌效果最好A.水蒸气B.饱和蒸汽C.过热蒸气D.湿饱
苏合香属于()。A.酸树脂B.油树脂C.香树脂D.油胶树脂E.混合树脂
( )是投标的关键性工作,其是否合理不仅直接关系到投标的成败,还关系到中标后企业
C解析元素组成相同,考元素种类。观察可发现,奇数项的图形都只由方块组成,偶数项的图形都只由椭圆组成。依此规律,第五个图形应只由方块组成,C项符合。故正确答案
“建国君民,教学为先”这句话反映了()。 A.教育与政治的关系 B.教育与经
根据《水利建设项目稽察办法》(水安监[2017]341号),稽察工作应坚持的原
最新回复
(
0
)