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(-3)×(-3)×(-3)×(-3)的积的符号是________,结果是________.
(-2)×(-2)×(-2)×(-2)的积的符号是________.
(-2)×(-2)×(-2)×(-2)的积的符号是__.
下面乘积中符号为正的是
0×(-3)×(-4)×(-5)
(-6)×(-15)×(-)×
-2×(-12)×2
-1×(-5)×(-3)