ʹ˵:

1.ѡʿ⣺
ԴGood,Better,Bestִʿ,Good>Better>Best,Best>Better>Good.
ĬΪBestʿ.

2.滻ٷֱ:
100滻,ѡ100%Ϊȫ滻,ѡ80%滻80.

3.ֻ滻״γ:
AA,BB,CC,AA
ѡд,ֻеһAAᱻ滻.

4.ųб
Ϊ˱Ĺؼʲ滻,ڴҪĵ,һһ,Ҫӿոַ.
