动臂式和尚未附着的自升式塔机，塔身上不得悬挂标语牌。（）
参考答案：对
电解槽炉底返热，铝水温度高于电解质温度，电解质水平适当，要想把炉底温度降下来必须采取（）降温
A、冰晶石
B、电解质块
C、铝水
D、固体铝
His work is better than that of______. [ ]
A. anyone else
B. else anyone
C. anyone other
D. someone other
