单选题 设有如下规则: r1: IF E1 THEN (2,0.00001)H1 r2: IF E2 THEN (100,0.0001)H1 r3: IF E3 THEN (200,0.001)H2 r4: IF H1 THEN (50,0.1)H2 且已知P(E1)= P(E2)= P(E3)= 0.6, P(H1)=0.091, P(H2)=0.010,又由用户告知:P(E1|S1) =0.84,P(E2|S2) =0.68,P(E3|S3) =0.36,用主观Bayes方法求P(H2|S1 ,S2,S3)=