托福阅读化学类学科词汇梳理

化学领域文章是学生比较难读懂的文章之一，下面小编就和大家分享托福阅读化学类学科词汇梳理，希望能够帮助到大家，来欣赏一下吧。

托福阅读化学类学科词汇梳理

托福阅读背景知识汇总之超现实主义

超现实主义(Surrealism)

第一次世界大战完毕后的几年, 人们开始怀疑理性主义, 虽理性主义然使欧洲的文化, 政治达到顶峰但还是发生了恐怖一次大战. 虽然达达派(Dada)的艺术风靡了当时的欧洲画坛. 但是把印了字的纸片洒在地上作诗, 似乎太过消极了. 超现实主义(Surrealism)这时开始萌芽了. 1924年, 超现实主义的创始人, 也是达达派的诗人与评论家-安德烈布尔顿发表了"超现实主义宣言"(The Surrealist Manifesto). 宣言中指出: 超现实主义是结合了意识的和无意识的精神领域在每天的现实生活中而完成世界的美梦与幻想. 简单的说, 超现实主义不但重视人类意识的思考, 另外更重视下意识的范畴. 他们用科学的方法研究人在无意中画出的图画, 信手写出的字, 小孩或疯子的图画, 结合心理学与精神病学的原理, 配合上人的梦境与幻想. 结论是: 美是在解放了的意识中那些不可思议的幻象与梦境. 所以超现实主义是一种超理性, 超意识的艺术. 超现实主义的画家不受理性主义的限制而凭本能及想象, 表现超现实的题材. 他们自由自在的生活在一种时空交错的空间, 不受空间与时间的束缚, 表现出比现实世界更真实更有意义. 超现实主义首先在法国展开, 立即受西班牙画家的欢迎, 很快普及到全世界. 而原本是单纯的美术改革运动, 不久也影响到了文学, 雕刻, 戏剧, 戏剧舞台, 电影, 建筑等其它的应用艺术, 所以超现实主义可以说是影响全世界的新文艺运动. 但在第二次世界大战时, 大量的艺术家迁往美国, 同时影响美国超现实主义的风行. 1945年后"新具象"在艺术之都巴黎兴起, 超现实主义才渐渐没落

托福阅读背景知识汇总之一种聚合凝胶

polymer gels一种聚合凝胶

The following information was part of our display for the SET96 and SET98 Scientific Power to the People Exhibition, The Galleries, Bristol, 20th and 21st March 1998.

A POLYMER is a very long molecule rather like a very long piece of string.

The borax joins two molecules together to make a large network - rather like flexible scaffolding. This is cross-linking.

This turns the fluid dissolved polymer into a GEL.

In oil wells water is pushed down to push oil up. If this breaks through to the production well bore, the well will just produce water. A solution is to block the rock pores with polymer gel to make the well produce oil again. These gels can be made from naturally occurring sugar-based polymers such as Guar and they can be cross-linked with Cobalt or Chromium.

Other everyday examples of polymer gels are to be found in non-drip emulsion paints, foods, car tires and agrochemicals.

The polymer that we are using is POLYVINYL ALCOHOL and we are joining the strands together with BORAX. This gel, when colored, is sold in toyshops as SLIME.