阅读理解。
Learn to relax. Overwork is the main reason why so many students feel tired and stressed (紧张). Cut
down some of the jobs you need to do each day so that you can only focus on the most important things.
Leave time for activities that are relaxing and fun. This might mean reading a good book, listening to the
music, going for a walk or taking a relaxing bath.
Get a good night's sleep. Getting enough sleep will help you keep your body and mind in the best form.
If you stay up late and need to get up early for school the next day, you may not be able to concentrate
(集中) on the things you need to do.
Exercise regularly and eat well. Don't rush through your meals. Eat less junk food (垃圾食品) or fast
food. Eat healthy food instead.
Get to know pleasant people. Some people are optimistic, while others not. Choose optimistic people
as your friends and spend more time with them and you'll be as happy as them.
Learn to be calm (平静) when you face any problem. Find out the best option from those that are in
your mind. Knowing that you are able to solve problems is a good way to build up your self-confidence
(自信).
Have a happy attitude (态度). Your attitude decides the way you see things. Is your cup half full or
half empty? Learn to think more positively (积极地) about the difficulties you face.
1. What's the main idea of the article? [ ]
A. Don't work or study too hard.
B. What kind of relaxing activities can we do?
C. Getting enough sleep, exercising regularly and eating healthily are very important.
D. How to feel relaxed and happy under the stress of study and work.
2. What's the meaning of the underlined word? [ ]
A. 主动的
B. 认真的
C. 乐观的
D. 轻松的
3. Which statement is right? [ ]
A. We need to do as many things as possible each day.
B. Enough sleep is very necessary for keeping us in top form in both body and mind.
C. We should save our time in eating.
D. We should try to make as many friends as possible.
4. To be away from worries, which point is not mentioned in this article? [ ]
A. Going to a psychologist (心理学家) for help.
B. Finding time to do the favorite things.
C. Making sure which things are the most important and which people can make us relaxed and happy.
D. Having an active attitude towards life.
5. According to the writer, one should regard his "cup" _____. [ ]
A. a cup
B. half full
C. empty
D. half empty
可知，水和煤油吸收相同的热量，升高的温度相同，由于水的比热容是煤油的2倍，所以煤油的质量是水的2倍，故C正确；沿海地区，水多，内陆地区水少、沙石多．因为水的比热容较大，白天，相同质量的水和沙石比较，吸收相同的热量，水的温度升高的少；夜晚，放出相同的热量，水的温度降低的少，使得沿海地区昼夜的温差小，故D正确．故选BCD．