Cellphone feels like a part of your body? A global survey has found that most people can’t live without 
their mobiles, never leave home without them and, if given a choice, would rather lose their wallet.
Calling mobile phones the “remote control” for life, market research firm Synovate’s poll said cell phones are so ubiquitous that by last year more humans owned one than did not.
Three-quarters of the more than 8,000 respondents polled online in 11 countries said they take their phone with them everywhere, which Russians and Singaporeans the most attached.
More than a third also said they couldn’t live without their phone, topped by Taiwanese and again Singaporeans, while one in four would find it harder to replace the mobile than their purse.
Some two thirds of respondents go to bed with their phones nearby and can’t switch them off, even though they want to, because they’re afraid they’ll miss something.
Mobiles have changed the nature of relationships, with the survey finding a fifth of all respondents set up first dates via text and almost the same number use the same method to end a love affair.
Apart from the obvious calling and SMS-ing, the top three features people use regularly on their mobile phones globally are the alarm clock, the camera and the games.
As for email and Internet access, 17 percent of respondents said they checked their inboxes or surfed the Web on their phones, led by those in the United States and Britain.
One in 10 respondents log onto(注册) social networking websites such as Facebook and MySpace regularly via mobile, again led by Britain and the United States.
Not everyone is tech savvy(科技通), however,37 percent of respondents said they don’t know how to use all the functions on their phone.
1. How many people of all respondents end a love affair via text?
A. About 4,800. B. About 3,600.
C. About 2,400. D. About 1,600.
2. According to the survey, like surfing the Internet with a cellphone most.
A. Singaporeans B. Russians C. Americans D. Chinese
3. Which of the following functions of cellphones is the least used?
A. Calling. B. Playing games.
C. Taking photos. D. Surfing the Internet.
4. Which would be the best title of the passage?
A. People can live better without the cellphone.
B. People would rather lose their wallet than their cellphone.
C. Different uses of the cellphone.
D. New functions of the cellphone.
，带电粒子质量为m，电荷量为q，初速度为v0，不计粒子重力。求：