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Ŀ` Ŀ Ŀ Ŀӱ ݺͷ Ƚ ͼֽ ̬ ܷ 10 30 20 20 10 10 Ҫӱд ֵ ȼ Aϵ1.0 CϵΪ0.6 רҵ ϣӱһ ݷϱѧ ʵչƣһĿѧԡѧǿȷ һ ȷ ˵ṹͼֽߣ١ ȫһ ؼɣ棬ڷܺѧ ˵ṹһ㣬νشͼֽһ㣬н϶ һ ̬һ ܡȷܡһ㣬ػشȷ н϶ `
ע1۵ȼΪABCDļACΪBCΪD 2ÿ÷=ֵ ? (ȼϵAΪ1.0BΪ0.8CΪ0.6DΪ0.4) 3дšС֮һ
ʽһʯĻеͼ4-22ʾƤʹ2˳ʱ