江苏省2020-2021学年高二下学期3月英语试题分类汇编：七选五专题 Word版含答案

They found this plant could provide them with a variety of useful products. By pointing or grinding （磨）,the seeds were turned into flour and used to make bread. Oil, also used in bread making, was obtained by squeezing the seeds. The native people enjoyed eating the seeds as a healthy snack, food.

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. Native Americans also used the oils of the sunflower for hair grooming. Purple and yellow hair dyes （染发剂）were made from sunflowers and used as body paint and a way to decorate textiles and baskets. The dried stalks （茎秆）,being light and strong, were ideal for use as a building ma

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