, the forest fire would have been discovered much earlier.

A．But for their care

B．Had they been more careful

C．Without their care

D．If they were careful

考虑固定资产余值回收时，固定资产回收费用的计算公式是( )。

A．M_F=I_F×(A/P，i_s，n₂)
B．M_F＝(I_F-SV)×(A/P，i_s，n₂)
C．N_F＝(I_F-SV)×(A/P，i_s，n₂)+SV×i_s
D．M_F＝W×i_s