Do you have a mobile phone? Do you send text messages to your friends and family?

Text messaging or texting is becoming very popular. But scientists have discovered that texting can give us problems with our hands. Be careful!Too much texting can cause swelling (腫脹) in our thumbs (拇指) . Our thumbs are not made for pushing small buttons (按鈕) over and over. Scientists call this problem RSI  (重復(fù)性勞損) . Harriet Wilson,who treats many people with RSI,says we need to see how much time we spend in typing text messages. If we spend more than 10〜15 minutes once,we may have problems in the future.

As mobile phones develop,they are getting smaller with buttons closer together. Texting with a smaller phone is worse than using a larger phone with bigger buttons. Using a computer keyboard and playing video games can cause the same problem. So more and more people find themselves with RSI. Among them,most are university students and teenagers,as they do not know the risks of spending so much time using computers,mobile phones and playing video games.

根據(jù)短文內(nèi)容，回答下列問題。

51. What is becoming very popular now?

52. Does the underlined word “once” mean “one time” in the second paragraph?

53. Who is easier to have the problem of RSI?

54. What can also cause the problem of RSI except texting?

55. Which is easier to cause the problem of RSI,using smaller mobile phones or larger ones?

51. Texting./Text messaging. 

52. Yes,it does.

53. University students and teenagers. 

54. Using a computer keyboard and playing video games. 

55. Using smaller mobile phones. /Using smaller ones.

題目來源：2016年通城學(xué)典課時(shí)作業(yè)本九年級(jí)英語下冊(cè)譯林版 > 中考模擬自測(cè)卷(二）

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