饲料生产过程一般可分为（）工段。
A.原料接受清理工段
B.粉碎工段
C.配料混合工段
D.制粒工段
E.成品打包工段
参考答案：A, B, C, D, E
He ______ dinner at restaurant, but now he usually comes back home after work and cooks supper for his family.
A．used to have
B．is used to have
C．was used to have
D．is used to having
根据《中国移动集团客户及宽带接入（客户侧）工程施工工艺标准》，OLT设备机架安装的距离应满足（）要求。
A.机架前方不小于600mm
B.机架背面和墙之间不小于100mm，如需要背部操作，距离应不小于600mm
C.机架侧面和墙之间不小于100mm
D.机架之上不小于300mm
E.机架前方不小于800mm
