1, too long to play cards: For the promotion of academic, enhance friendship, it is not large. Playing cards can be played every day, and it is most wasteful. 2, too frequently selling. There are many kinds of places, such as listening to non-non-unreasonable and selling, seeing the beautiful woman and so on. 3, persistently pursue an MM that is impossible to pursue. It is a waste of money and hurting self-esteem. 4. Full of fantasy to learn a future use, you will not truly become the expert of this class. 5, always look at the same non-professional book or the same movie over and over again. I will see Wu Xia Qiong Yao once again, I don't mean. 6, insomnia. The biggest feature is that it is confused when you sleep, you can't sleep, and you can't see it during the day. 7. The upper outroad look. This is very difficult to rapidly raise oral English, because most of the number of spoons are very water, but also squeezed. Of course, if another purpose, it will not be the same. 8, look at the picture that should not look at it. I refer to too much. Seeing a certain level you will understand: See everything is a matter, too hard. 9. Extremely not actually test a fundamental graduate. It is better not to take. With this effort, it is better to test a second major. 10. Just find a job when you graduate, do not conduct scientific analysis and extensive discussion. This kind of killing is relatively large, you will have an answer ten years later.