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为了帮助大家写好雅思写作小作文，下面小编给大家带来雅思写作流程图怎么写，希望对大家有所帮助!
雅思写作流程图怎么写
剑桥雅思5Test2Passage1的阅读相信正在准备考试的小烤鸭们一定不陌生，就是那篇讲“酚醛塑料诞生”的文章。我们先来看看在这篇文章中第五段，对于“酚醛树脂制备”描述。
文章原文如下：“The original patent outlined a three-stage process, in which phenol and formaldehyde (from wood or coal) were initially combined under vacuum inside a large egg-shaped kettle. The result was a resin known as Novalak, which became soluble and malleable when heated. The resin was allowed to cool in shallow trays until it hardened, and then broken up and ground into powder. Other substances were then introduced: including fillers, such as woodflour, asbestos or cotton, which increase strength and moisture resistance, catalysts (substances to speed up the reaction between two chemicals without joining to either) and hexa, a compound of ammonia and formaldehyde which supplied the additional formaldehyde necessary to form a thermosetting resin. This resin was then left to cool and harden, and ground up a second time. The resulting granular powder was raw Bakelite, ready to be made into a vast range of manufactured objects. In the last stage, the heated Bakelite was poured into a hollow mould of the required shape and subjected to extreme heat and pressure, thereby ‘setting’ its form for life. ”
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