你能用绘图的方法,说明在池塘生态系统中能量流动是怎样进行的吗?
太阳能→藻类、浮游植物→草食性鱼类→肉食性鱼类
To tell you the truth, if you want to study abroad, you must pay more attention to _______English every day.
A.practise speaking
B.practising speaking
C.practising to speak
D.practise to speaking
3~6个月婴儿每天约15%~23%的热量用于生长发育。()