Doyouhaveamobilephone?Doyousendtextmessagestoyourfriendsandfamily?Textmessagingortextingisbecomingverypopular.Butscientistshavediscoveredthattextingcangiveusproblemswithourhands.Becareful!Toomuchtextingcancaus

Question

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 (肿胀) in our thumbs (拇指) . Our thumbs are not made for pushing small buttons (按钮) over and over. Scientists call this problem RSI  (重复性劳损) . 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.

根据短文内容，回答下列问题。

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?

Answer 1

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.