A、[40×(P/A,5%,8)+1000×(P/F,5%,8)]×(P/F,5%,1/2)
B、[40×(P/A,5%,7)+1000×(P/F,5%,7)]×(P/F,5%,1/2)
C、[40+40×(P/A,5%,7)+1000×(P/F,5%,7)]×(P/F,2.5%,1)
D、[40+40×(P/A,5%,7)+1000×(P/F,5%,7)]×(P/F,5%,1/2)
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