(2016•荆门)- Are you going to watch" Running Man" tonight?
- No! I____ it with my parents only once. I don't think it's exciting.
A:see
B:have seen
C:will see
D:am seeing
以生态学的观点,解释水稻种植过密反而减产的主要原因是( )
综合地貌、气候两大要素,可以把我国自然地理环境分成三大自然区:东部季风区、西北干旱半干旱区、青藏高寒区。据此完成题。