But after a few months at college, I changed myself小题1:. I met new people. I started learning about history, politics, and the world. I didn’t have the time or patience for long phone conversations. I stopped caring so much about things like makeup. I once went to a party with no makeup on, but I felt fine. I just laughed about it. My new way of thinking brought me 小题2:my mother. Now, I talk to my mother almost every day. We get along quite well. We go to movies小题3:and read the same books. I tell her about my problems and she gives me good小题4:. Last month, my mother helped me through a bad time. She is an amazing person. I know that now.

丘陵地的等高线高程中误差为( )。

A．1/2

B．1/3

C．1/4

D．1/5