题目内容

If m=2，then

(-m)3×(-1)4-|-12|÷[-(-

)2]

-m2×(-

)+[1-32×(-m)]

=（　　）

A、-2

B、-1

C、1

D、2

分析：先把

(-m)3×(-1)4-|-12|÷[-(-

)2]

-m2×(-

)+[1-32×(-m)]

进行化简，然后把m=2代入即可得出答案．

解答：解：∵m=2，
∴

(-m)3×(-1)4-|-12|÷[-(-

)2]

-m2×(-

)+[1-32×(-m)]

-m3+12m2

m2+1+9m

=2．
故选D．

点评：本题考查了分式的化简求值，难度不大，关键是先把原式化为最简再进行求值．

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