A. r2,1=1.17R=1.71 B. r2,1=1.71 R=1.17 C. r2,1=1.0 R=1.5 D. r2,1=1.5R=1.0
A. 32.48% B. 17.11% C. 30.36% D. 20.05%
A. (1)f(A)=1.255,f(B)=1.490(2)w(A)=16.48%,w(B)=9.82% B. (1)f(A)=1.255,f(B)=1.490(2)w(A)=9.82%,w(B)=16.48% C. (1)f(A)=1.490,f(B)=1.255(2)w(A)=9.82%,w(B)=16.48%