①—Is she seven?
—No, she isn't. She's eight.
②— Is she ten?
—Yes, she is.
③— Is she nine?
— Yes, she is.
④—Is she nine?
—No,she isn't. She's seven.
____
关于运动的位移和路程,下列说法正确的是( )
所谓地球是太阳系一颗特殊的行星,其特殊性体现在( )