A.2‰ B.5‰ C.3‰ D.1‰
A.預(yù)購合同 B.采煤?jiǎn)挝缓陀妹簡(jiǎn)挝婚g的供應(yīng)合同 C.易貨合同 D.電網(wǎng)與用戶之間簽訂的供用電合同
A.750 B.1450 C.100 D.1000