题干

最近意大利罗马大学的FuNvio Cacace等人获得了极具理论研究意义的N4分子。N4分子结构如图所示,已知断裂1molN-N吸收193kJ热量,生成1molN≡N放出941kJ热量。根据以上信息和数据,下列说法正确的是  (    )

A:N4属于一种新型的化合物

B:N4是N2的同系物

C:N4转变为N2是物理变化

D:1molN4气体转变为N2放出724kJ能量

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D

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    A life coach is somebody who helps you reach all kinds of personal and professional goals(目标). Each of us has the ability to be our own life coach. Here is some advice about how to be your own life coach:

    Pay attention to your relationships with others. Ask yourself the following questions: How do you deal with disagreements? When was the last time you showed your family members that you care for them? Your relationships with friends, family members and teachers show a lot about the kind of person you are.

    Face the fears about the future. Now, imagine that one of your good friends told you that he or she was not strong enough to go back to school. We often give better advice than we are willing to take ourselves. Remember that even the most successful people were probably told that what they wanted to do was impossible. ①但是他们坚持努力工作,永不放弃。

    Develop your talents. ②If you want to achieve your goals, you will have to spend more time developing the talents you already have. And you should also uncover (发现)any hidden talents that you haven't discovered yet. So you can take classes in subjects that you are interested in, even if you have no experience.

    Be thankful. Take some time to be thankful for the things you do have. Remember positive (积极的) things. Think of the best days you have had in the past month or year. Remember special parties, vacations and holidays. Thank for the wonderful people you have in your life.