题目

以9.8m/s的初速度水平抛出的物体，飞行一段时间后，垂直地撞在倾角为的斜面上。由此可知物体完成这段飞行的时间是（    ）A．    B．   C．    D．  答案：C解析: 阅读下面的短文，并根据文章后的要求答题。（请注意问题后的词数要求）Recently using a mobile phone has become a fashion. Do you often send text messages (短信) to your friends or family? If you keep sending text messages over and over again, there may be something wrong with your fingers. Everybody using the mobile phones should be careful. If you don’t, you may get injured one day.Text messaging or texting is becoming popular. But scientists have found out that texting can give us problems with fingers. Too much texting can make your fingers uncomfortable. When we press small buttons over and over again, we may have a disease called RSI. RSI is short for Repetitive Strain Injury (重复性力损伤).Harriet Wilson is a doctor. She has many patients with RSI. She says we should check how much time we are spending in typing text messages. _________ we spend more than 10 to 15 minutes every day, we could have such problems in the future.Mobile phones are getting smaller and smaller. And the buttons are getting closer together. Texting with a smaller phone is worse than using a larger phone with bigger buttons. So it’s a good idea to use a larger phone. If you use a computer keyboard and play video games for long, you may have the same problem. More and more people can find themselves with RSI.1. What’s the result of keeping sending text messages over and over again?(no more than 8 words)__________________________________________________________________2. Translate the underlined English sentence into Chinese.__________________________________________________________________3.Fill in the blank in Paragraph 3 with a proper word. (one word)__________________________________________________________________4.Will we have the same problem if we use a computer keyboard or play video games for long?__________________________________________________________________5.Why do we had better use a large phone? (no more than 15 words)__________________________________________________________________