1,20.1亿千瓦时➗30万千瓦➗4➗24=70天2,20.1➗26.8x100%=75%3,20.1x90%➗75%➗26.8x100%=90%4,30x4x10x3600x10000000=mgh=pgVhV=30x4x10x3600x10000000/(1000x10x100)=0.432亿立方米