(7.2×69×1/2)÷(1.8×2.3×20)=( )

shuhaiku2019-12-17  2

问题 (7.2×69×1/2)÷(1.8×2.3×20)=( )

选项 A.6B. 3/2C.3D. 3/4

答案C

解析
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