ѹϷĿ¼

ֻҩ

1ˮ

Ʒ9 Ҫȼ8 ѵ100

5  

ɵ0.2  = 

ˮ

ϣɳx20 Ĳx100ɫx1

Чľֵ60㣬鲨0.95 5죨3000Ϸʱ䣩

  

2쵤

Ʒ9 Ҫȼ8 ѵ1

1  

ɵ-0.2  = 

Խ

ϣĵرx1x1,龧x5

Ч
ά2
ľֵ10㣬鲨0.1 
