-4的绝对值是( )
A:14
B:-14
C:4
D:-4
下列选项存在关联错误的一组是( )
Miss Miller is really a nice teacher. She teaches _______ English patiently.
①要坚持绿色消费 ②要坚持科学消费 ③要遵循价值规律 ④要坚持正确的消费观