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
9
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] 【C15】
选项
A、across
B、along
C、down
D、through
答案
D
解析
从所填词后的different levels of water可推知,运河流经高低不同的水面,故答案为[D]through。go through意为“经历,通过”。go across是“渡过,越过”的意思,多指从物体表面通过,故排除[A];[B]along和[C]down作介词时均意为“沿着”,与后面的different levels of water不搭配。
转载请注明原文地址:https://www.tihaiku.com/zcyy/3156973.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
[originaltext]Welcometomylecture!Today,Iwilltellyouamaxim—giving
体层摄影中选择层间距大小的依据是A.被照体的厚度 B.被照体的深度 C.被照
氨苯砜抗麻风病作用机制()A.抑制细菌依赖于DNA的RNA多聚酶,阻碍mRN
脂质体的膜材主要为A.磷脂,胆固醇 B.磷脂,吐温80 C.司盘80,磷脂
已操作的操作票应加盖(____)章“已操作”$;$“已执行”$;$合格$;$已终
( )的教育思想,要求教育不仅要关注人的当前发展,还要关注人的长远发展,更要关
甲在候车室以需要紧急联系为由,向赵某借得高档手机,边打电话边向候车室外移动,出门
言论自由是公民监督和制约公权力的重要手段。现代法治国家,往往以言论自由作为衡量一
从用户应用的角度分类,一般可将计算机分为()。A:微型计算机B:服务器C:终
关于中空玻璃的特性的说法,正确的有()。A.光学性能差 B.保温隔热 C.
最新回复
(
0
)