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
医学
A、The development of cement. B、The use for cement. C、Various construction material. D、Cement-production countries. A显然,本篇短文讲的是水泥
A、The development of cement. B、The use for cement. C、Various construction material. D、Cement-production countries. A显然,本篇短文讲的是水泥
admin
2013-12-06
85
问题
One of the primary materials used in the construction of buildings and roads is cement, a powder made primarily from limestone and clay. Even though the ancient Egyptians and Romans used a kind of cement, it was not until 1824 that an English bricklayer developed a cement strong enough for modern roads and buildings.
While experimenting in his kitchen, the bricklayer found that a mixture of limestone and clay that had been heated together formed a hard, stone-like chunk as it cooled. When this substance was ground into a fine powder it could be stored indefinitely.
When the powder was mixed with water, it made an excellent quality of cement that quickly hardened in sunlight or even under water. With only a few variations, this is how cement is made today.
Questions 26-30 are based on the passage you have just heard.
26. What is the main topic of the passage?
27. Who developed the kind of cement that is used today?
28. Where was modern cement first made?
29. How is cement stored?
30. According to the speaker, how does modern cement compare with that of 150 years ago?
选项
A、The development of cement.
B、The use for cement.
C、Various construction material.
D、Cement-production countries.
答案
A
解析
显然,本篇短文讲的是水泥的发展历程。
转载请注明原文地址:https://kaotiyun.com/show/E8U3777K
本试题收录于:
医学博士外语题库考研分类
0
医学博士外语
考研
相关试题推荐
Imagineadiseasespreadingacrosstheglobe,killingmostlymiddle-agedpeopleorleavingthemchronicallydisabled.Thenoned
High-speedlivinghasbecomeafactoflife,andthefranticpaceistakingitstoll,accordingtosciencewriterJamesGleick.
Thepopularideathatclassicalmusiccanimproveyourmathsisfallingfromfavor.Newexperimentshavefailedtosupportthew
About14,000peoplewillcontractHIVtoday.Andtomorrowandthedayafterthat,andeverydayfortheforeseeablefuture.That
InMr.Allen’shighschoolclass,allthestudentshaveto"getmarried".However,theweddingceremoniesarenotrealonesbut
Fourteen-year-oldSeanMeCallumlayinahospitalbedwaitingforanewheart.Withoutit,Scanwoulddie.Sean’scaseisnotu
Whenaforestgoesablaze,itdischargeshundredsofchemicalcompounds,includingcarbonmonoxide.
A、Sheistoohardonme.B、Sheaskstoomanyquestions.C、Sheisalwaysconsiderateofmyfeelings.D、Sheisthemeanestmother
A、Hedoesnotintendtoofferthecourse.B、Hedoesnotthinkthecoursewillinteresther.C、Heneveracceptsundergraduatesin
Britishscientistsarepreparingtolaunchtrialsofaradicalnewwaytofightcancer,whichkillstumoursbyinfectingthemwi
随机试题
Justbecausetheycan’tsingoperaorrideabicycledoesn’tmeanthatanimalsdon’thaveculture.There’snobetterexampleof
波分光路交换是指光信号在网络节点中不经过光/电转换,直接将携带的信息转移到另一任意指定的()。
Youseemtotakeakeenerinterestinthesubject______haseverbeenshownbefore.
患者,女性,35岁。左肾结石行ESWL治疗,排除碎石颗粒成分分析为磷酸镁铵结石,为预防结石复发,下列说法中错误的是
现金比率的提高,不仅增加资产的流动性,也会使机会成本增加。()
梵音洞与()南北相对,合称为“两洞朝音"。
调节策略属于学习策略的()。
清代三大木版年画产地是天津杨柳青、苏州桃花坞、山东潍坊杨家埠。()
在软件开发中,需求分析阶段产生的主要文档是
Maybeunemploymentisn’tsobadafterall.Anewstudysaysthathavingademanding,unstableandthanklessjobmaymakeyoueve
最新回复
(
0
)