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
79
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.
【37】
选项
A、under
B、on
C、with
D、without
答案
C
解析
mix with是个固定用法的动词词组。用其他的介词都不合适。
转载请注明原文地址:https://kaotiyun.com/show/qwJd777K
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
Withunfamiliarhumanbeings,whenweacknowledgetheirhumanness,wemustavoidstaringatthem,andyetwemustalsoavoidign
Withunfamiliarhumanbeings,whenweacknowledgetheirhumanness,wemustavoidstaringatthem,andyetwemustalsoavoidign
Supermarketshoppershaveneverbeenmorespoiltforchoice.Butjustwhenwethoughttraditionalsystemsofselectivefarmingh
Withunfamiliarhumanbeings,whenweacknowledgetheirhumanness,wemustavoidstaringatthem,andyetwemustalsoavoidign
YouwillhearaninterviewwithProf.JesseAusubelabouthisoptimisticattitudestowardsenvironmentalissuestoday.Asyouli
Somedoctorsaretakinganunusualnewapproachtocommunicatebetterwithpatients—theyareletting【C1】______readthenotestha
Somedoctorsaretakinganunusualnewapproachtocommunicatebetterwithpatients—theyareletting【C1】______readthenotestha
Supermarketshoppershaveneverbeenmorespoiltforchoice.Butjustwhenwethoughttraditionalsystemsofselectivefarmingh
随机试题
我国现行荷载规范规定,在计算风荷载时地面粗糙度分为
Weshallhaveanopportunitytoexchange______tomorrow.
阿片样肽、促黑素、促皮质素原(POMC)基因编码多种作用于垂体的调节蛋白,在不同的脑区,由该基因编码的蛋白质具有不同的C-末端肽,下述叙述是其最佳解释的是
对旅客携带的骨灰盒 、神龛、像等特殊物品,处理正确的是()
桥面铺装施工的主要检验内容包括()。
以下所有的方式都可以在债券平价发行时降低其票面利率,除了
一个关系数据库文件中的各个元组()。
Seariseasaresultofglobalwarmingwouldimmediatelythreatenthatlargefractionoftheglobelivingatsealevel.Nearlyo
PeopleknewthenatureofWolfveryWell.TherearefewergreyWolvesinEuropethanintheUSA.
WhatisDr.Francis?
最新回复
(
0
)