the harm of mobile phone手机的危害.ppt

文档介绍：The harm of mobile phone
functions of mobile phone
who can tell us some
?
talking on the phone
surfing
listening to music
Do you know?
When we enjoy these functions,it may do harm to our health.
。
when we are talking on the phone
1.
harm of radiation.
harm of germ.
when we are surfing .
2.
vision .
our figures stiff.
radiation
3.