lagree with this opinion. | have two
reqSOnS.
First,smartphones have too many
functions,which caqn caquse users to be far
more dependent on them.Dependence on
them invites students to stay up to Iate
and use them while walkind .
Second,they has a negative impact on
the student's body. Alot of blue light can
give serious daqmage to student's eyes
and students continue to look at their
smartphones, their posture will be bad.
For these reaqsons, | think that they're
harmful to students.