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
2023-11-10
43
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] 【C17】
选项
A、ways
B、methods
C、means
D、approaches
答案
C
解析
by means of为固定搭配。意为“通过…,用…的方法”。
转载请注明原文地址:http://tihaiku.com/zcyy/3174671.html
相关试题推荐
AlthoughAsiancountriesaregenerallymore______insocialcustomsthanWestern
Theyaretalkingvigorouslyaboutthepeopleandcountries______theyhadvisit
RelationsbetweenthesetwoAfricancountrieswereatalow______.A、flowB、tide
EuropeanUnioncountrieshaveagreedto______.[originaltext]EuropeanUnion
What’stheseriousproblemthedevelopingcountriesface?[br][originaltext]
What’stheseriousproblemthedevelopingcountriesface?[originaltext]OnW
ConservationistsonTuesdayappealedtocountriestourgentlyaddressnewth
ConservationistsonTuesdayappealedtocountriestourgentlyaddressnewth
ConservationistsonTuesdayappealedtocountriestourgentlyaddressnewth
ConservationistsonTuesdayappealedtocountriestourgentlyaddressnewth
随机试题
Inordertoworkheretheforeignerneedsaworkpermit,whichmustbe【C1】__
[originaltext]M:Nexttimeyouinvitemetodinner,shallIbringabottleofw
InEnglish,thecolorgreenisassociatedwithjealousy,whichissometimes
Newtechnologylinkstheworldasneverbefore.Ourplanethasshrunk.It’s
关于模板的配制方法的说法中错误的是()。A.按图纸尺寸直接配制,适用于结构形
A.风寒郁肺 B.风热郁肺 C.毒热闭肺 D.肺脾气虚 E.痰热闭肺麻杏
公务员辞去公职,应当向任免机关提出书面申请,任免机关应当自接到申请之日起()
当企业出现与银行往来异常的现象时,银行应该()。 A.从企业本身获取信息
在一项队列研究中,计算出某研究因素的RR值的95%的可信区间为0.15~0.67
在招标工程量的编制中,确定暂列金额的因素不包括()。A.施工图纸的深度
最新回复
(
0
)