Optical illusion








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How does Caffeine Keep us Awake?

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How does caffeine keep us awake? - Hanan Qasim Vocabulary Study (Please read choose a word in video that means to you)  單字, 詞性(n./adj./v….),中文意思, 例句 adenosine (n.) 腺甘酸 Adenosine is a chemical that can make us drowsy. dopamine（n.）多巴胺 Dopamine is a chemical that makes you pleasure. urination (n.) 排尿 she was unable to speak,eat,control urination or move her body. insomnia (n.)失眠 Too much stress will sometimes cause insomnia. metric (adj.)公制的 Metric units have been widely used in modern society.          Answer the following questions: How does caffeine work in your body? What’s the pros and cons of caffeine?      a.(林睿宏)  Caffeine act as a stimulant system for our central nervous system. It can block adenosine, a substance that can draw us sleepy. 1.Pros: Reducing the adenosine iseases like Pakinson's, Alzheimer's, and some types of cancer. Making us feel better and alert. 2.Cons:   (1)Raising our heart rate and blood pressure, which can increase urination or diarrhea.   (2)Contri
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Whatever Happened to Acid Rain?

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  Whatever happened to acid rain? - Joseph Goffman Vocabulary Study (Please read choose a word in video that means to you) 單字, 詞性(n./adj./v….),中文意思, 例句 marine (adj.) 海洋的 Acid rain would destroy marine ecosystem. corrode(v.) 侵蝕 Acid rain may corrode structures made of stone and metal. mounting (adj.) 增長的 There was mounting concern in his voice. utility (n.) 效用 Since their expected utilities are the same, the rationality of choosing one cannot differ from that of choosing the other. arboreal (adj.) 樹棲的 Koalas are kind of arboreal animal, and most of their life live on eucalyptus.          Answer the following questions: What causes the acid rainfall ? What could be done to stop it ?          a.(林睿宏)  1.When water interacts with oxides of nitrogen or sulfur dioxide provided by emissions of the power plants or exhaust gas of the vehicles, it then produces sulfuric acid and nitric acid, which is the main composition of acid rain. 2.By adding desulfurizing scrubbers to the smokestacks of pow
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