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单选题

A．They should be done away with.
B．They are necessary in our lives.
C．They enrich our experience.
D．They are harmful to health.

参考答案B

解析:Let's say you start to brainstorm a list of all the emotions you've ever experienced. Just for fun, try it now.
What's on your list? Chances are, you included things like happy, sad, excited, angry, afraid, grateful,proud, scared, confused, stressed, relaxed and amazed. Now sort your list into two categories—positive emotions and negative emotions.
( 16 ) Feeling both positive and negative emotions is a natural part of being human. We might use the word "negative" to describe more difficult emotions, but it doesn't mean those emotions are bad or we shouldn't have them. Still, most people would probably rather feel a positive emotion than a negative one. It's likelyyou'd prefer to feel happy instead of sad, or confident instead of insecure.
What matters is how our emotions are balanced--how much of each type of emotion, positive or negative,we experience.
Negative emotions warn us of threats or challenges that we may need to deal with. For example, fear can alert us to possible danger. It's a signal that we might need to protect ourselves. Angry feelings warn us that someone is stepping on our toes, crossing a boundary, or violating our trust. Anger can be a signal that we might need to act on our own behalf.
Negative emotions focus our awareness. They help us to zero in on a problem so we can deal with it.( 17 ) But too many negative emotions can make us feel overwhelmed, anxious, exhausted or stressed out.When negative emotions are out of balance, problems might seem too big to handle.
The more we dwell on negative emotions, the more negative we begin to feel. Focusing on negativity just keeps it going. Positive emotions balance out negative ones, but they have other powerful benefits, too.
Instead of narrowing our focus like negative emotions do, (18) positive emotions affect our brains in ways that increase our awareness, attention and memory. They help us take in more information, hold several ideas in mind at once, and understand how different ideas relate to each other. When positive emotions open us up to new possibilities, we are more able to learn and build on our skills. That leads to doing better on tasks and tests.
People who have plentv of positive emotions in their everyday lives tend to be happier, healthier, learn better, and get along well with others.
预览三道题各选项，由第16题中的enrich，harmful和第18题中的expand，narrow等词可以推测，讲座内容与一个会对人造成积极或消极影响的事物有关。
What does the speaker say about negative emotions?
B。讲座开头部分指出，积极或消极的情绪是人类与生俱来的一部分。我们可能会用“消极”这个词来形容那些更加艰难的情绪，但这并不意味着那些情绪是不好的，或者我们不能有那些情绪。接下来讲话者又指出了消极情绪的重要作用。由此可知，无论积极的情绪还是消极的情绪都是生活中所必需的，不能简单地用好或者坏进行划分。因此答案为B。

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