如:harmful,addicted,caffeine,work faster等等,这样我们就可以有一个大概的猜想:对话讨论的焦点应该是A项。而后稍加分析,可以得出其他选项在对话中出现的比重很小,所以不可能成为议题。因此,A项便毫无疑问地成为最佳答案。 知识模块:对话听力结果一 题目 what is the conversation mainly about A.The effects of. ...
Caffeine can counteract this effect to some degree. By independently blocking the action of adenosine in the brain, caffeine can undermine its ability to induce sleepiness. This is how caffeine functions as a stimulant, increasing alertness and energy levels even when we should otherwise be sleepy....
B. It's a kind of drink that has a very high level of caffeine. D. It's a kind of drink that has stimulants. 能量饮料是一种含有高浓度咖啡因和刺激物的饮料。虽然能量饮料可能含有糖分,但其主要成分并非糖分。能量饮料提供的“能量”主要是通过刺激神经系统,而不是提供实际的能量物质。因此,...
What is Caffeine? Caffeine is a stimulant, which is extracted from more than 60 different types of plants all over the world. The word “caffeine” is derived from the German word “kaffee” and the French word “café,” both of which mean coffee. Caffeine is scientifically known as 1,3...
It is the routine task itself,as much as the stimulating(刺激的)effects of caffeine,that makes the process so important,says Mason Currey,author of Daily Rituals:How Artists Work."A lot of artists use the process of making coffee as a gateway to the creative process,"he adds."You need ...
Is caffeine bad for you? Caffeine is known to be safe when consumed in moderation. Every day, millions of people enjoy food and beverages with caffeine, including coffee, tea and soft drinks. Because caffeine has been consumed for centuries, we know a lot about it. It is widely studied, ...
Is caffeine bad for you? Caffeine is known to be safe when consumed in moderation. Every day, millions of people enjoy food and beverages with caffeine, including coffee, tea and soft drinks. Because caffeine has been consumed for centuries, we know a lot about it. It is widely studied, ...
Caffeine is one of agroup of drugscalled methylxanthines, which have several effects on the body: They stimulate thecentral nervous system; They increase the frequency of urination (arediuretics); They stimulate theheartmuscle; and They increasesmooth musclerelaxation, which affects body systems regu...
Today, caffeine is used much as it has been for generations: It provides a "boost of energy" or a feeling of heightened alertness. Many former students can recall using strong coffee or caffeine pills to stay awake while cramming for finals. Likewise, drivers on longroad tripsoften fill thei...
Caffeine is also an addictive stimulant. In humans, it stimulates thecentral nervous system, heart rate, and respiration, has psychotropic (mood altering) properties, and acts as a mild diuretic. A normal dose of caffeine is generally considered to be 100 mg, which is roughly the amount found...