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
Plastics are materials which are softened by heat and set into last form 1.______ when are shaped in a mold. Some are natural; s
Plastics are materials which are softened by heat and set into last form 1.______ when are shaped in a mold. Some are natural; s
admin
2011-07-28
69
问题
Plastics are materials which are softened by heat and set into last form 1.______
when are shaped in a mold. Some are natural; some are semi-synthetic, the 2.______
result of chemical action on natural substance; some are synthetic, built up
from the constituents of oil or coal. All is based on the chemistry of carbon, 3.______
with its capacity of forming chains. The molecules that compose them 4.______
(monomers) link together in the setting or curing process to form chains
(polymers), which give plastics their flexible strength. Some plastics retain
their ability to be softened and reshaped; as wax, they are thermoplastic. 5.______
Others set permanently in the shapes they are given by heat and pressure;
like bags, they are thermosetting.
From industrial beginnings in nineteenth century, plastics have 6.______
struggled through a hundred and twenty years of glory, failure, disrepute
and suspicion on the slow road to public acceptance. Now, at last, one can
positively say that plastics are appreciated and enjoyed for what they are;
that they make modern life rich, more comfortable and convenient, and 7.______
also more fun. Plastics are warm materials, sympathetic with the human 8.______
touch, and their transformation into things that come into contact with human
beings is entirely appropriate.
The fact there are plastic antiques comes as a shock to most people. 9.______
How can a material that seems so essentially twentieth century, and one
that is so much associated with cheap, disposed products, has a history 10.______
at all? It is a young technology, and a great part of the fun of collecting
plastics is that beautiful pieces of historical interest can still be found very
cheaply.
选项
答案
disposed—disposable
解析
本题为形容词误用。这两个词词形相近,但disposed为动词的过去分词,表示“被丢弃的”或指人“乐意……的,愿意……的;有……倾向的”;disposable表示“可一次性使用的”。这里指塑料的优点特性,应用disposable。
转载请注明原文地址:https://kaotiyun.com/show/EcYO777K
0
专业英语八级
相关试题推荐
TerritorialExpansionoftheUnitedStatesTerritoryDateAcquiredSquareMilesHowAcquiredOriginalstatesandterritories
Whilethepercentageofurbanresidentsishigherinrelativelydevelopedcountries,developingcountrieshaveanincreasingnum
Jealousy’sPurposeGoodmorning,everyone.Today’slecturewillfocusonacommonpsychologicalproblem—jealousy.Evolutionar
Jealousy’sPurposeGoodmorning,everyone.Today’slecturewillfocusonacommonpsychologicalproblem—jealousy.Evolutionar
Jealousy’sPurposeGoodmorning,everyone.Today’slecturewillfocusonacommonpsychologicalproblem—jealousy.Evolutionar
Thedestructionofournaturalresourcesandcontaminationofourfoodsupplycontinuetooccur,largelybecauseoftheextreme
Thedestructionofournaturalresourcesandcontaminationofourfoodsupplycontinuetooccur,largelybecauseoftheextreme
A、blowupanapartmentbuildingintheU.S.B、gainaccesstosufficientnaturalgasandexplosivesC、prepareforaterroristat
随机试题
WhyisTheGreatGatsbyasuccessfulnovel?
东奥公司预投资某一项目,该项日有甲、乙两种方案,总投资额均为3000万元,其收益的概率分布如下表所示:假没该公司设定的风险投资系数为8%,无风险收益率为6%。要求:分析判断甲、乙两种方案是否可取。
女,62岁,咳喘25年,近三年稍动即气促,三天前发热、咳黄痰,入院时动脉血气分析pH7.30,each7.3kPa(55mmHg),PaCO210kPa(75mmHg),BE-10mmol/L。此例酸碱平衡紊乱最佳诊断为
A、麻醉药品B、一类精神药品C、毒性药品D、二类精神药品E、处方药连续使用后易产生身体依赖性,能成瘾癖的药品是
下列有关破产清算、重整与和解的表述,说法正确的是?
城市规划区内农村居民点、乡镇企业的建设应该()。
次高压A地下燃气管道与管沟内的热力管之间的水平净距不得小于()。
分部分项工程成本分析的对象为( )。
某小区一户人家遭盗窃,四个嫌疑人被传讯,供述如下:小赵:我们四人都没作案。小钱:我们中有人作案。小孙:我没作案。小李:小钱和小孙至少有一人没作案。已知四人中有两人说真话,两人说谎话,可以推出()。
在面向对象技术中,(12)是指作用于不同对象的同一个操作可以有不同的解释,从而产生不同的执行结果。
最新回复
(
0
)