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。（）
