A:甲和乙所包含的所有种群构成群落
B:乙1的同化量越大,流向乙2的能量就越少
C:丁的CO2含量增加将导致臭氧层被破坏
D:丙不一定是原核生物
下列现象中不属于合作关系的是( )
I cannot . It's very dark. ( )
These beds are made of wood and are of high q____.