在海关放行前遭受损失的货物可根据海关认定的受损程度减征关税。( )
参考答案：对
Using his hybrid rice, farmers are producing harvests before.[ ]
A. as twice large as
B. twice large than
C. larger than twice
D. twice as large as
刀具材料的硬度越高，（）越低。
A、强度
B、韧性
C、耐磨性
D、冲击韧性
E、疲劳强度
