18.Mobile phones help us easily find people anywhere at any time.A mobile phone can include many things,such as games,music and Internet access(互聯(lián)網(wǎng)接入).Today,4.6billion people around the world have mobile phones,according to CBS News.
However,mobile phones may cause cancer,according to the World Health Organization.In a 2010 study,people who used a mobile phone for 10 years or more were more than two times as likely to get brain cancer,according to CNN.
"I think it is a good idea to give the public some kind of warning that long-term exposure(暴露) to radiation (輻射) from your mobile phone could possibly cause cancer,"told Dr Henry Lai.Lai is a scientist of bioengineering(生物工程) at the University(大學(xué)) of Washington who has studied radiation for more than 30years.
These suggestions may help you reduce your risk of cancer:
1.Use a headset(耳機) or speaker
Headsets give out much less radiation than phones.Some headsets give out low-level radiation.However,you should take it off your ear when you're not talking to anyone.Using your phone with a speaker will also make it safer.
2.Listen more,talk less
Your phone gives out radiation when you talk or text,but not when you're listening or getting messages.Listening more and talking less can lower the risk of cancer.
3.Hold the phone away from your body
Hold the phone away from your body when you're talking,not against your ear.Also,don't keep it in your pocket.
4.Choose texting over talking
Phones give out less radiation to send texts than to carry a person's voice.Texting also keeps radiation away from your head.
5.Poor signal?Stay off the phone
A poor signal means that the phone needs to give out more radiation to work.Make and take calls when your phone has a strong signal.
28.The study from 2010showed thatC.
A.people should use mobile phones for no more than 10years
B.people who don't use mobile phones will not get brain cancer
C.the longer people use mobile phones,the more likely they are to get brain cancer
D.the more mobile phones people have,the more likely they are to get brain cancer
29.Which is NOT true about the suggestions mentioned in the passage?A
A.Some headsets don't give out radiation.
B.It's not good to carry mobile phones in pockets.
C.Texting is better than making phone calls.
D.Don't make calls when the signal is weak.
30.The passage mainly talks aboutD.
A.the development and advantages of mobile phones
B.the reason why mobile phone radiation causes cancer
C.the best ways to use mobile phones to communicate
D.how to protect ourselves from mobile phone radiation.
分析 手機幫助我們能很容易的隨時隨地找到人.手機可以包括很多東西,比如游戲、音樂和互聯(lián)網(wǎng).如今,全世界有46億人擁有手機.手機有很強的輻射,這樣患癌癥的風(fēng)險更大,因此短文提出了幾點相關(guān)的建議.
解答 28.C細(xì)節(jié)理解題.根據(jù)第二段In a 2010 study,people who used a mobile phone for 10 years or more were more than two times as likely to get brain cancer,according to CNN可知據(jù)CNN在2010年的一項研究中,人們使用手機10年或更久的將會得腦癌的數(shù)量超過兩倍.結(jié)合選項第三項正確.故選C
29.A細(xì)節(jié)理解題.根據(jù)第三段Headsets give out much less radiation than phones.Some headsets give out low-level radiation.可知耳機比手機的輻射更少.一些耳機可以降低輻射強度.結(jié)合選項,明確第一項不符合短文中提到的建議.故選A
30.D主旨大意題.根據(jù)文章內(nèi)容可知本文主要講述了手機輻射的危害,我們?nèi)绾伪Wo自己免受危害,故選D.
點評 做題時要在理解好文意的基礎(chǔ)上,與題目有機的結(jié)合,從文章中找到相關(guān)細(xì)節(jié)性的句子與選項細(xì)細(xì)比對,進行選擇或推理判斷,選出符合文章內(nèi)容的正確選項.做題注意靈活,有時可采用排除法或直選法確定出最終答案.