A.= B.≠ C.≤ D.>
A.讀數(shù)差2倍 B.讀數(shù)1/2倍 C.讀數(shù)之差 D.讀數(shù)之和
A.絕對(duì)值 B.開平方 C.函數(shù)計(jì)算 D.或