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
Here is the story of rubber. From the earliest time it was common knowledge to the Peruvians(秘鲁人)that when a cut was made in the
Here is the story of rubber. From the earliest time it was common knowledge to the Peruvians(秘鲁人)that when a cut was made in the
admin
2010-06-30
70
问题
Here is the story of rubber. From the earliest time it was common knowledge to the Peruvians(秘鲁人)that when a cut was made in the outside skin of a rubber tree, a white liquid like milk came out, and that from 【21】______ a sticky mass of rubber might be made. This rubber is 【22】______ when warm, so that it is possible to give it any 【23】______ . The Peruvians made the 【24】______ 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 【25】______ 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 【26】______ , and our raincoats are still named after 【27】______ .
These first rubber overshoes and raincoats were all soft and sticky 【28】______ summer, and hard and inelastic (没有弹性的)in the winter 【29】______ it was cold. 【30】______ the rubber we have today is soft and elastic, it is very strong 【31】______ in the warmer summer and the colder winter. This was made possible by a man 【32】______ Goodyear. After many 【33】______ , he found that nitric acid(NHO3) made the rubber 【34】______ better, but it is not hard and strong enough. Then strange thing 【35】______ . A friend of his, Nicholas Hayward, had the 【36】______ in his sleep that rubber might be made hard and strong if mixed 【37】______ sulphur and put in the sun. Goodyear put this idea to the test, and saw that it did have more or less the desired 【38】______ though somewhat less than more. The only effect it had was on the outside of the rubber. 【39】______ is common knowledge now that the way to make rubber hard and strong is by heating it with sulphur. It took Goodyear four more years to find this heating method. When 【40】______ he did it, he had nothing at all. Everything of the smallest value had been used to get money, even his sons’ school-books.
【40】
选项
A、at worst
B、at least
C、at last
D、at most
答案
C
解析
本句的意思是:当他最终找到这种加热方法的时候,他已身五分文了。“最终”的英文词是at last。用选项A的at worst(最坏的情况下)、选项B的at least(至少)、选项D的at most(最多),都不合适。
转载请注明原文地址:https://www.kaotiyun.com/show/cwJd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
Thethreatofdiseasessuchasinfluenzaortuberculosisre-emerginginvirulentformhasbeenacommonthemeinrecentyears.T
Supermarketshoppershaveneverbeenmorespoiltforchoice.Butjustwhenwethoughttraditionalsystemsofselectivefarmingh
Withunfamiliarhumanbeings,whenweacknowledgetheirhumanness,wemustavoidstaringatthem,andyetwemustalsoavoidign
YouwillhearaninterviewwithProf.JesseAusubelabouthisoptimisticattitudestowardsenvironmentalissuestoday.Asyouli
Somedoctorsaretakinganunusualnewapproachtocommunicatebetterwithpatients—theyareletting【C1】______readthenotestha
Somedoctorsaretakinganunusualnewapproachtocommunicatebetterwithpatients—theyareletting【C1】______readthenotestha
Somedoctorsaretakinganunusualnewapproachtocommunicatebetterwithpatients—theyareletting【C1】______readthenotestha
Supermarketshoppershaveneverbeenmorespoiltforchoice.Butjustwhenwethoughttraditionalsystemsofselectivefarmingh
Supermarketshoppershaveneverbeenmorespoiltforchoice.Butjustwhenwethoughttraditionalsystemsofselectivefarmingh
随机试题
肾肿瘤的肾外表现不包括【】
毒性剧烈,治疗剂量与中毒剂量相近,使用不当会致人中毒或死亡的药品是直接作用于中枢神经系统,使之兴奋或抑制,连续使用能产生依赖性的药品是
某省电视剧制作中心摄制的作品《星空》正式播出前,邻省的某音像公司制作了盗版光盘。制作中心发现后即向音像公司所在地的某区法院起诉,并在法院立案后,请求法院裁定音像公司停止生产光盘。音像公司在接到应诉通知书及停止生产光盘的裁定后,认为自己根本不是盗版,故继续生
某企业拟拆除该单位的污水处理设施,下列叙述中,不符合环境保护法要求的是()。
关于期货交易所的总经理和副总经理的说法正确的是( )。
一般法人投资者申请开户,应当具备符合企业实际的参与股指期货交易的决策机制和操作流程,决策机制是()。
操作风险评估通常从()两个角度开展。
动物每年的迁徙都是______的,但这就是一个优胜劣汰的自然过程。在“职场动物园”也一样,你的存在是因为被需要、具有价值,如果一个人成为团队的__________,即使团队成员竭力保护你,也难保不会被虎视眈眈的鳄鱼_________。因此,独立、自强、强烈
将一篇在电脑上打好的文章按一定格式排版所属的学习类型是()。
仅以单项选择题的形式出现的问卷属于()
最新回复
(
0
)