焊接场地必须符合工作要求，必须无（）物品。
参考答案：易燃、易爆
The roof fell before he had time to ________ the room to save his baby. [ ]
A. dash off
B. dash into
C. dash out
D. dash up
影响营养生理需要量的因素有（）
A.年龄
B.劳动状态
C.性别
D.生理特点
E.以上全都对
