学生频繁看手机

　　NBC News: A recent survey found that one in seven Americans would rather give up their best friends for a week than part with their smartphones.

　　An even greater number — 40 percent of respondents — said it would be difficult, if not impossible, to surrender their phones for a day, even if offered $100 to shed their cellular handcuffs.

　　The 518 people surveyed said they keep their devices within reach, day and night. The desire to remain in constant contact is so great, they frequently don't turn off their phones.