甲数是a，乙数比甲数的2倍少b，乙数是______．
2a-b，
故答案为：2a-b．
（）的抗拉强度比钢筋混凝土用热轧光圆钢筋、热轧带肋钢筋高许多。
A、冷拔低碳钢丝
B、冷拉钢丝
C、预应力钢丝
D、钢绞线
Miss Gao is in the _____________. 
Li Ming is in the _____________.
Danny is in the _____________. 
Jenny is in the _____________.