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
外语
The Development of Rubber Here is the story of rubber. From the earliest time it was common knowledge(51)the Peruvians that whe
The Development of Rubber Here is the story of rubber. From the earliest time it was common knowledge(51)the Peruvians that whe
admin
2009-06-15
60
问题
The Development of Rubber
Here is the story of rubber. From the earliest time it was common knowledge(51)the Peruvians that when a cut was made in the outside skin of a rubber tree, a white liquid(52)milk came out, and that(53)this a sticky (粘的) mass of rubber might be made. This rubber is soft when. warm, so that it is possible to give it any(54). The Peruvians made the(55)that it was very good for keeping out the wet. Then in the early 1800’s, the Americans made use of it for the first time. First they made overshoes to(56)their feet dry. Then came a certain Mr. Mackintosh, who made coats of cloth covered with natural rubber. From that day to this we have been coating cloth with rubber as Mr. Mackintosh(57), and our raincoats are still named after him.
But these first rubber overshoes and raincoats were all soft and sticky in summer, and(58)and inelastic (无弹性的) in the winter when it was cold. But the rubber we have today is soft and elastic (有弹性的),(59)very strong—even in the warmest summer and the coldest winter. This was made(60)by a man called Goodyear. After many(61), he found that nitric acid (硝酸) made the rubber much better, but it is not hard and strong enough. Then a strange thing took(62). A friend of his, Nicholas Hayward, had the idea in his sleep that rubber might be made hard and strong if mixed with sulphur (硫磺) and put in the sun. Goodyear put this idea(63)the test, and saw that it did have more or less the desired effect—though somewhat less than more. The only effect it had was on the outside of the rubber. It is common knowledge now that the(64)to make rubber hard and strong is by heating it with sulphur. It took Goodyear four more years to find this method. When at last he did it, he had(65)at all. Everything of the smallest value had been used to get money, even his sons’ school-books.
选项
A、like
B、alike
C、resembled
D、similar
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/Oahd777K
本试题收录于:
职称英语理工类C级题库职称英语分类
0
职称英语理工类C级
职称英语
相关试题推荐
HappyMarriage,HappyHeartHappilymarriedpeoplehavelowerbloodpressure(51)unhappilymarriedpeopleorsingles,aBri
Hypnosis(催眠)1IncreasingnumbersofAmericandoctorsareusingatechniqueknownashypnosis.Theysayhypnosisoftencanhelp
SprainedAnkleOneofthemostcommoninjuriesteenagersandadultsexperienceisasprainedankle.Asprainoccurswhenthe
Whatdoactivistsworryabout?Theword"message"inthelastparagraphmeans______.
SomeUnusualCelebrationsSomeholidaysarewell-knownallaroundtheworld.AmongthemareNewYearsEvecelebrations.Al
BreastCancerDeathsRecordLowThenumberofwomendyingfrombreast(乳房)cancerhasfallentoarecordlowbydroppingund
A.wherefewerpeoplediefromheartproblemB.whethertheyhavetheriskofheartattack,heartfailureorstrokeC.wouldpro
Thequestion"Areyouamanoramouse?"reallymeanstoaskwhetheryoubelieveThelastparagraphtellsusthatwhenyouare
Thewayonelooks,talksandmovesdependsThemainideaofthethirdparagraphis
随机试题
TheaverageBritishpeoplegetsix-and-a-halfhours’sleepanight,accordingtotheSleepCouncil.Ithasbeenknownforsomet
距离桥梁、陡坡、隧道50米以内的路段不能停车。
患儿,男性,8岁。两周前有上呼吸道感染史,近日出现畏寒、发热,全身皮肤、黏膜出血,并有大片瘀斑,实验室检查血小板计数18×109/L,出血时间延长。对此患儿采取静脉输血治疗的目的是
(司考试题)甲厂生产健身器,其产品向乙保险公司投保了产品质量责任险。消费者华某使用该厂健身器被损伤而状告甲厂。甲厂委托鉴定机构对产品质量进行鉴定,结论是该产品确有质量缺陷,后甲厂被法院判决败诉并承担诉讼费。在此情形下,乙保险公司应承担的保险赔偿责任应包括下
利用房地交易、出租中包含的地价资料评估基准地价时,先要采用交易租价扣除法从房屋等的交易价格、租金中分离出样点地价,要注意所收集的交易价和租金的()。
1999~2009年,在朱家尖南沙已经成功举办了十届中国舟山国际沙雕节。()
日本松下电器公司创建于1918年,现已发展成为享誉世界的名牌企业集团,在全球家用电器市场上占据重要地位。松下集团创始人松下幸之助在日本享有盛名,被誉为“经营之神”,他的照片上了美国《时代》周刊的封面。有一次,松下电器举办了一期人事干部研讨会.与会
设X1,X2,…,Xn是来自总体X的简单随机样本,X的概率密度为其中θ>0,试求θ的最大似然估计.
定义学生、教师和课程的关系模式S(S#,Sn,Sd,Dc,Sa)(其属性分别为学号、姓名、所在系、所在系的系主任、年龄);C(C#,Cn,P#)(其属性分别为课程号、课程名、先修课);SC(S#,C#,G)(其属性分别为学号、课程号和成绩),则该关系为(
A、Allthecommitteemembersexceptthechairmanwereagainsttheproposal.B、Nobodywantedtoputforwardaproposaltoopenas
最新回复
(
0
)