A:冬至日
B:夏至日
C:春分日
D:秋分日
关于生态平衡依赖于生态系统的自我调节能力的叙述,不正确的是( )
There are ______ floors in the building and my home is on the ______ floor.
It's cold.
_______ there a phone box near here? ( )