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3.14除以400 =157/20000 如果本題有什麼不明白可以追問,如果滿意請點擊“選為滿意答案”
7 手機提問的朋友在用戶端右上角評估點【滿意】即可. 互相幫助,祝共同進步!
428除以500=0.856
32
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