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
109
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
BlackEurope
HubbleSpaceTelescope
Corporatesocialresponsibilityisaprocesswiththeaimtoembraceresponsibilityforthecompany’sactionsandencourageapo
Three-Dprintersareusedtomakeeverythingfromautomobilepartstobonereplacementsforhumanpatients.Americanresearchsc
ItsforeignpolicyisbecomingnotsomuchIslamicasOttoman,reestablishingasphereofinfluenceithadfor400years.Abdull
HomeownershiphasletUSdown.Forgenerations,Americansbelievedthatowningahomewasanaxiomaticgood.Ourpoliticallead
Itwasbeyondhispowertosignsuchacontract.
Onanypersonwhodesiressuchqueerprizes,NewYorkwillbestowthegiftoflonelinessandthegiftofprivacy.Itisthislar
Wisdominthemindisbetterthanmoneyinthehand.
随机试题
俗话说:“人逢喜事精神爽。”这是哪一种情绪状态【】
双曲舌簧弯制中,错误的是
选择的高压电器,应能在长期工作条件下和发生过电压、过电流的情况下保持正常运行。各种高压电器的一般技术条件需要验证额定开断电流的有()。
材料、长度均相同而粗细不同的两根杆件,在相同的荷载作用下()。
对公司所在的区位进行分析,包括( )。
信用社收入、成本、费用的确认,除国家另有规定者外,应遵循()。
政府调动社会政策运行所需财力资源的最主要方式是()。[2008年真题]
一、注意事项1.申论考试必须在指定位置用钢笔或圆珠笔作答,并在指定的位置填写(或填涂)自己的姓名及有关信息。2.申论考试与一般的写作考试不同,它是对应考者阅读理解能力、分析能力、提出并解决问题能力和文字表达能力的综合测试。3.请先仔
索引属于()。
Heranasfastashecouldandreachedthetrainstationwith______afewsecondstospare.
最新回复
(
0
)