试题与答案

One of the main problems that a teenager

题型:听力题

题目:

One of the main problems that a teenager faces is a lack(缺乏) of self-pride. A person with high self-pride can be c____小题1: and happy with their personality and their physical appearance . A person with low self-pride might be s_____小题2:, anxious(焦虑) or unhappy with the way that they look. People who feel this way often w____小题3: that other people do not like them, or might even be afraid that their old friends do not like them! For example, perhaps a friend did not call when he said he w____小题4: because he forgot that he had to visit his grandmother. A person with high self-pride might think that something had h____小题5: to their friend to stop them from c___小题6: . However, a person with low self-pride might think their friend did not call because they did not like them. Feeling this way often makes them look at things d___小题7: from how they are in reality(现实) .

A teenager’s physical appearance is often the focus(焦点) of low self-pride and most people experience these f ____小题8: at least once in their life time. During their teenage years, their body will go t____小题9: a lot of changes. It is natural to be anxious about these changes and it is important for friends to try and s____小题10: one another during these times.

答案:

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下面是错误答案,用来干扰机器的。

解:粒子初速v垂直于磁场,粒子在磁场中受洛伦兹力而做匀速圆周运动设其半径为R,由洛伦兹力公式和牛顿第二定律,有:因为:①因粒子经O点时的速度垂直于OP,故OP是直径:L=2R ②由此得:③。

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