网址:http://m.1010jiajiao.com/timu3_id_2377410[举报]
Computers can injure (伤害) you. Most other injuries happen suddenly. For example, if you fall over a bike and break your arms, it happens very . But computer injuries happen slowly. You probably know how to ride a bike safely. Now learn to use a computer safely.
Your eyes light can injure your eyes, never sit too close to a computer screen. Your eyes should be 50centimeters(厘米)on the screen. remember to look away from it. This gives your eyes a rest. When you use a computer, the window be on your left or your right. If it is behind you, the light will reflect on(反射)the screen. If the window is in front of you, the sun and the screen will shine into your eyes.
Your hands and wrists(手腕)
Hand and wrist injuries can happen because the hands and wrists are moved in the same way. Hundreds of times. If you use a keyboard for a long time, these three rules: 1)Rest your wrists on something. 2)Keep your elbows(肘)at the same height as the keyboard. 3)Stop sometimes and exercise your hands, wrists and fingers in a different way.
Your back
Some people sit for many hours in front of a computer. If you sit in the wrong way, you can injure your back or your neck. So you should sit with your back straight. The top part of the screen should be in front of your eyes. Your forearms, wrists, hands and the upper part of your legs should all be parallel(平行)to the floor. If you are sitting for a long time, get up every 30 minutes and your arms, legs and neck. your computer, but use it safely.
1.A. much quickly B. faster C. slowly D. quickly
2.A. Too many B. Too much C. Much too D. Many more
3.A. so B. because C. but D. when
4.A. at last B. at most C. at least D. less than
5.A. Sometime B. Some time C. Some times D. Sometimes
6.A. can B. may C. must D. should
7.A. both B. never C. all D. neither
8.A. follow B. work C. copy D. write
9.A. need B. exercise C. walk D. shake
10.A. Enjoy B. Watch C. Protect D. Keep
查看习题详情和答案>>
Zhang Li lies in bed sadly. The 24-year-old young man lost his right leg because of a blood disease (血液病). The doctor said that his 10 years of smoking had caused the disease.
“I first smoked a cigarette when I was in Junior 3. It made me feel like a man and I thought it looked cool. Now I know I was really wrong,” said Zhang.
According to the 2008 China Tobacco Control report (中国烟草控制报告), 130 million young people who are under 18 years old have tried smoking. Fifteen million of them are addicted (上瘾的).
The report came out on May 31, World No-Smoking Day. (83)It also found that nearly 68% of teenage smokers smoked their first cigarette before the age of 13. Those living in big cities started even earlier.
“Some tobacco companies try to make cigarettes cool and attractive. It’s just to make money,” said Yang Gonghuan, a doctor. In fact, smoking is one of the top killers in China. Each year 1 million people die from smoking-related (与吸烟有关的) diseases. Smoking causes illnesses like lung cancer and heart disease.Doctors say that the younger a person starts smoking, the worse it will be. If a person starts smoking as a teenager, he or she may live twenty-two years less than non-smokers.
根据短文内容将下列句子补充完整。
1. Zhang Li’s disease was caused by ______________________________
2. Doctors think that non-smokers will live ___________________ longer than those who began smoking as a teenager.
将短文中划线的句子译成汉语。
3.______________________________________________________________________
根据短文内容回答问题。
4.Why did Zhang Li smoke at first? ___________________________________________
5.If someone smokes too much, what diseases can he develop?
_______________________________________________________________________
查看习题详情和答案>>
Who’s the boy in the photo? Yes, he is Liu Wei, an armless pianist.
Liu lost both arms in an accident at the age of 10, but he never gave up his dream of becoming a pianist. He couldn’t find a teacher 5 (teach) him to play the piano with his feet. So he learned it by himself. He kept practicing for 7 hours every day. Three years later, he became the champion of China’s Got Talent. And he 6 (choose) as one of the “Top Ten People Who Touched China in 2011.” He often 7 (say) “For people like me, there are only two choice: one is to give up all dream, which will lead to a quick, hopeless death. The other is to struggle without arms to live an outstanding life.”
What can you learn from Liu Wei?
查看习题详情和答案>>