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
考研
The manufacture of plastics requires a large quantity of heavy machines as well as knowledge of science. Today the greater part
The manufacture of plastics requires a large quantity of heavy machines as well as knowledge of science. Today the greater part
admin
2019-03-20
97
问题
The manufacture of plastics requires a large quantity of heavy machines as well as knowledge of science. Today the greater part of plastics is manufactured by the world’s great oil refineries and chemical works. Chemical works are factories which produce chemicals—a manmade liquids, gases and solid materials. The refineries and chemical works produce many different kinds of raw plastics, which are then taken to the tens of thousands of factories which made plastic products.
Machines for making plastic objects are very different from those used for manufacturing articles of wood or metal or other natural materials. For raw plastics must first be softened by heat and then pressed into moulds. It is the moulds which give plastic objects their shapes. These moulds can be of any shape or size. And the same mould can be used over and over again. In fact one mould can produce many thousands of articles before it wears out. This is one of the reasons why plastic things are so cheap.
选项
答案
生产塑料需要大量的有关重机器以及科学方面的知识。如今,较大部分的塑料都是由世界上大的炼油厂以及化工厂生产。化工厂指的是生产化学制剂(人工液体、气体以及固体物质)的工厂。炼油厂、化工厂生产各种各样的原塑料,然后这些原塑料被送往数以万计的工厂去生产塑料制品。 生产塑料制品的机器与那些生产木制的、金属的或其他天然材料的产品的机器截然不同。原因是原塑料必须先经过高温软化,然后再挤压成模具。就是这些模具使得塑料制品有了形状。这些模具的形状、大小各异,并且同样的模具可以反复使用。事实上,一个模具在它破损之前可以生产出成千上万件物品,这就是为什么塑料制品如此便宜的原因之一。
解析
转载请注明原文地址:https://kaotiyun.com/show/FEfa777K
本试题收录于:
翻译硕士(英语翻译基础)题库专业硕士分类
0
翻译硕士(英语翻译基础)
专业硕士
相关试题推荐
theMillenniumDevelopmentGoals
rightsandinterests
VOD(VideoonDemand)
Globalizationistransformingtheworld.Whileitbringsgreatbenefitstosomecountriesandindividuals—abacklashhasarisen
translationstudies
Laughlinacknowledgesthat"alotofresponsiblepeople"areworriedaboutatmosphericconcentrationsofcarbondioxidefrombur
Biogas:aSolutiontoManyProblemsInalmostalldevelopingcountries,thelackofadequatesuppliesofcheap,convenienta
IhadtheillusionthatIwasdrivingthroughoneimmenselylong,narrowfarm.Thevillagesandtownswereusuallyperchedonth
Almost40yearsago,whenLyndonJohnsondeclaredwaronpoverty,afamilywithacarandaDutchColonialinthesuburbsfeltp
EconomiesofScale
随机试题
行政机关及其行政执法人员不得因当事人、利害关系人提出异议或者申辩而加重处理。()
狼疮性肾炎慢性化病理指标不包括
畸胎瘤的好发部位是
对于有色金属管,其坡口加工的方法采用()。
下列代表一级域名的是( )。
套利交易的资金风险的规避需要一个动态的管理模型来管理资金,动态调整持仓比例。()
下列不属于行政诉讼当事人的是()。
某县进行县人大代表的选举。该县某民族乡由于人口特少,故作为一个选区。在选举中,选民李某被举报存在以暴力手段妨害选民自由行使选举权利。对于该举报,下列哪些说法正确?()
Themainideaofthepassageisthat______.BenjaminDavisJr.was______.
Asthesemesterisdrawingtoanend,thestudentunioniscallingonitsyouthto______thetemptationtocheatonexams.
最新回复
(
0
)