[演讲稿我的理想简单些能说1分钟周日要急急急！]尊敬的老师，亲爱的同学： 你们好！ 我今天要演讲的题目是《我的理想》。 理想就像阶梯，它帮助我们向着光明的未来攀登；理想就像指南针，它帮助我们寻找人生的方向。一个人如果没有理...+阅读

Coffee and health

Coffee contains several compounds which are known to affect human body chemistry. The coffee bean itself contains chemicals which are psychotropic (in a way some find pleasing) for humans as a by-product of their defense mechanism. These chemicals are toxic in large doses, or even in their normal amount when consumed by many creatures which may otherwise have threatened the beans in the wild.

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