A.兩位小數(shù)B.三位小數(shù)C.整數(shù)D.一位小數(shù)
A.(70±2)℃和/或(50±2)℃B.(23±2)℃C.(5±2)℃D.(23±2)℃和/或(50±2)℃
A.6B.7C.8D.9