请根据“观察人的口腔上皮细胞”实验回答下列问题：

       A teenage girl couldn't stand(忍受) her family rules，so she left home.
　　She wanted to be a star and became   1. But she had a little education and  a few years later，she had to ask for food on the street for a living. Now her father has2  . Her mother is an old woman. But she is still   3  her daughter. She went to every corner of the city. Everywhere she goes，she put up a big photo of herself on the wall. At the lower part of the 4 she writes，“I still love you …Come back home！”
      One day，the daughter saw one of the photos. She was so surprised that she couldn't believe her 5. “Is that my mother？”She moved6 and read the words，“I still love you…” She cried. When she got home，it was early morning. She pushed the door. The door   7  itself. She rushed to the bedroom at once. Her mother was sleeping there. She woke her mother up，“It's me！Your daughter is back home！”The mother and daughter looked at each other excitedly，full of 8tears. The daughter asked，“  9is the door unlocked？A thief could get in.” The mother answered softly，“The door   10 locked  after you left. We miss you all the time. We believe that you'll come back some day.”
The door of parents’ love for their children will never be closed.

随着手机的广泛普及，随处可见“低头族”，长期用耳机听音乐可能会损伤对声波敏感的细胞，使听力下降；长期玩手机可能会损伤对光敏感的细胞，使视力下降，上述两类细胞分别位于（　　）