plastics are the best insulator of electricity,rubber following it closely吗意思

plastics are the best insulator of electricity,rubber following it closely吗意思 Coal and oil are most_materials for the manufacturing of plastics.A artificial B building C raw Dsolid 选哪个?为什么 英语翻译The role of plastics The unhygienic use and disposal of plastics and its effects on human health has become a matter of concern.Colored plastics are harmful as their pigment contains heavy metals that are highly toxic.Some of the harmful 英语翻译Cutting Other Materials:The machining of plastics,fiber-reinforced plastics,graphite,asbestos,and other hard and abrasive constructional materials mainly requires abrasionresistance.Cutting pressures and power requirements are generally l photos are the bes way for people in one part of the world _(learn) aboutabout the troubles of another part. 你是最棒的英文怎么写是不是YOU ARE BES.. spring is the bes season of the year的意思 英语翻译To better permit the passage of light,many new plastics are processed using technologies rivaling those used in the manufacture of computer chips. Examples of homogeneous materials are individual types of plastics,ceramics. In the modern world many things are made of plastics _______ wood.A.except B.beside C.instead of D.without选什么,问什么? ____ plastics,the machine is light in weight 1、The bag（）（）（）（由……制成）plastics.1、They are （）（）（）（努力保护）the environment.3、Some of the swamps have（）（）（变得污染了） plastics是什么意思 plastics works 英语翻译Most conveniently,polymers are generally subdivided in three categories,viz.,plastics,rubbers and fibers.In terms of initial elastic modulus,rubbers ranging generally between 10(6) to 10(7) dynes/cm²,represent the lower end of the sc 哪种塑料有最大的市场份额Which of the following plastics has the highest market shareWhich of the following plastics has the highest market share?phenolicspolyethylenepolypropylenepolystyrenepolyvinylchloride 12.Many shoes nowadays are made of plastics and similar _____.A) stiff B) staff C) stuff D) stock16) The students ______for their respective dormitories after school.A) went B) headed C) spun D) flung our plastics are DOP .DEHP free .DEHP 和DEHP FREE 说的是两种增塑剂吗