A.20%-30% B.30%-40% C.40%-50% D.50%-60%
A.高于50%或者幾乎接近65% B.高于65%或者接近70% C.高于70%或者接近75% D.高于80%或者幾乎接近95%
A.40%-50% B.70%-80% C.80%-95% D.65%-70%