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兩個數相加得正數,這兩個數是什麼數 5 -離問題結束還有14天23小時 A,至少有一個正數. 正確 B,至少有一個負數. 5+5=10,錯 C,兩個都是負數. -5-5=-10,錯 D,兩個都是正數. 6-5=1,錯
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