首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
专升本
If you’ve gone to the same seashore for several years, you may have noticed that the beach gets smaller every year. The wind and
If you’ve gone to the same seashore for several years, you may have noticed that the beach gets smaller every year. The wind and
admin
2012-02-24
23
问题
If you’ve gone to the same seashore for several years, you may have noticed that the beach gets smaller every year. The wind and the waves carry the beach out to sea, bit by bit. Most shore towns try to fight the beach changes caused by ocean currents and the tides. Some dig sand out of backwater bays and dump it on the beachfront. Others build wooden piers and jetties made to keep currents away from the beach.
A type of artificial sand that has been developed might be able to slow down beach erosion. Strangely, this new kind of sand is made of ground glass! You might think that walking barefoot on ground glass would be painful. But it’s not. The reason is very simple. Sand and glass are made of the same kind of material, called silicate. When glass is ground very finely, you get a sand-like substance that is harder than real sand. The size of the pieces can be controlled. Larger pieces won’t be as easily affected by the wind and waves. So, a beach covered with artificial sand would last longer than a beach with real sand.
A wonderful thing about artificial sand is that it can be made from waste glass. But making artificial sand costs three times as much as using conventional methods of beach protection. So, it is not likely that sand made of glass will be used in the near future.
Ground glass is ______.
选项
A、hard to walk on
B、similar to sand but harder
C、difficult to make
D、found in nature
答案
B
解析
第二段。玻璃碎末非常细,人踩上去感觉跟踩在沙子上一样,只是比真正的沙子要硬一些。选项B是正确的。
转载请注明原文地址:https://kaotiyun.com/show/balC777K
本试题收录于:
英语题库成考专升本分类
0
英语
成考专升本
相关试题推荐
Theoldcoupledecidedto______aboyandagirlthoughtheyhadthreeoftheirown.
Henry’sjobwastoexaminecarswhichcrossedthefrontier(边境)tomakesurethattheywerenotsmuggling(走私)anythingintothec
I______myformerschoolteacherwhenIwasshoppingyesterday.
Afterthemineaccident,thegovernmentsentagroupofexpertsto______thematter.
Peopledonotanalyseeveryproblemtheymeet.Sometimestheytrytorememberasolutionfromthelasttimetheyhada【C1】______
Herearetwolettersfromourreadersexpressingtheirconcernaboutschoolassessment(评价):Studentsshouldbeallowedtos
Agroupofpeoplewhosharethesameinterestsandwayoflifeiscalledasociety.Sociologyisthesciencethatexamineshuman
Advertisementcanbethoughtof"asthemeansofmakingknowninordertobuyorsellgoodsorservices".Advertisementaimsto
Soccerisplayedbymillionsofpeopleallovertheworld,buttherehaveonlybeenafewplayerswhoweretrulygreat.Howdid
Somepsychologists(心理学家)maintainthatmentalactssuchasthinkingarenotperformedinthebrainalone,butthatone’smuscles
随机试题
面板堆石坝混凝土面板的养护包括().
为满足开拓市场需要,A个人独资企业投资人曾水决定在某市设立一个分支机构,并委托朋友霍火为分支机构负责人。下列有关霍火的权利和义务的说法中,不正确的有()。
若有C语言表达式2+3*4+7/3,以下选项中叙述正确的执行顺序是
血浆各种脂蛋白中,按其所含胆固醇及其酯的量从多到少的排列是
男性,40岁,间断上腹痛3年,多饥饿痛、夜间痛,进食后减轻。2小时前患者突发上腹痛,伴全身大汗,全腹剧痛;查体:腹肌紧张,全腹压痛、反跳痛阳性,考虑为溃疡穿孔可能。下列哪项体征最有助于溃疡穿孔的诊断
下列哪一种方法可以解除免疫耐受性
NobelPrizeforLiterature
Withaneighty-hourweekandlittleenjoyment,lifemusthavebeenvery______forthestudents.
A.abandonedB.assumedC.avoidingD.brieflyE.desiredF.divisionG.dodgeH.eventuallyI.presumed
Impressionismisaformofartthatbeganinthe1870’s.Whenyoulookcloselyatanimpressionistpainting,youseelittledots
最新回复
(
0
)