选择题:Youth is not a matter of time but a matter of self

题目内容:
Youth is not a matter of time but a matter of self-improvement, both physically and morally. Being a good youth, one should have those factors: the basic one is health. A healthy body is a kind of priceless treasure. One can do nothing without it. Secondly, we should pay essential attention to our moral character. We should be always willing to help those in trouble without any complaints. Moreover, we should care more about the people around us. Thirdly, cooperation and communication also play an important role in being a good youth. No one can live alone without any friends. And nobody can work out every problem without help of partners. So the youth should and must learn how to live and work well with others, including those people you don.t like to cooperate or communicate with. The last but not the least, patriotism, meaning a love of one.s country, is the one we should never forget. People always misunderstand the word “patriots” by thinking it only refers to those fighters who fight for their country. As a matter of fact, a patriot will do the things his country asks him to do. So being a youth is one thing, being a good one really needs to take every effort to make yourself to be.
  1. The passage really wants to tell us that ________.
  A) what the meaning of “patriots” is   B) the qualities a good youth should have
  C) a youth should be doing good  D) one shoul
参考答案:

散热热损失是指锅炉在运行中,汽泡、联箱、汽水管道、炉墙等的温度都高于周围空气的温度,通过对流和热辐射

散热热损失是指锅炉在运行中,汽泡、联箱、汽水管道、炉墙等的温度都高于周围空气的温度,通过对流和热辐射方式向外散失的热量损失。

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