轧制中厚板时，最初几道（）是限制压下量的主要因素。
A．咬入
B．主电机最大许用力矩
C．轧辊强度
参考答案：A
A Korean survey shows that shopping cart handles are the most bacteria-carrying items among some ________used objects.
A．relatively
B．ordinarily
C．frequently
D．sincerely
紫禁城
