| We all have offensive breath at one
time of another. In most cases, offensive breath emanates from bacteria in the
mouth, although there are other more surprising causes. Until a few years ago, what the most doctors could do was to counsel patients with bad breath about oral cleanliness. Now they are finding new ways to treat the usually curable condition. Bad breath can happen whenever the normal flow of saliva slows. Our mouths are full of bacteria feeding on protein in bits of food and shed tissue. The bacteria emit evil-smelling gases, the worst of which is hydrogen sulfide. Mouth bacteria thrive in airless conditions. Oxygen-rich saliva keeps their numbers down. When we sleep, for example, the saliva stream slows, and sulfide-producing bacteria gain the upper hand, producing classic "morning breath". Alcohol, hunger, l A. thrive on B. account for C. originate from D. descend from [单项选择] 第三篇 How We Form First Impression
We all have first impression of someone we just met. But why Why do we form an opinion about someone without really knowing anything about him or her - aside perhaps from a few remarks or readily observable traits
The answer is related to how your brain allows you to be aware of the world. Your brain is so sensitive in picking up facial traits. Even very minor difference in how a person’s eyes, ears, nose, or mouth are placed in relation to each other makes you see him or her as different. In fact, your brain continuously processes incoming sensory information - the sights and sounds of your world. These incoming signals are compared against a host of “memories” stored in the brain areas called the cortex(皮质) system to determine what these new signals “mean”.
If you see someone you know and like at school, your brain says “familiar and safe”. If you see someone new, it says, “new and potentially threatening”. The
A. we neglect their depth and breadth. B. they are not all jocks, peeks, or freaks. C. our thinking is similar to that of a very young child. D. our judgment is always wrong. 我来回答: 提交
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