在每次有新的装运货物到达时允许产品改变位置,以便于有效地利用仓库空间的做法被称为( )。
A.动态定位系统
B.跟踪定位系统
C.固定的货位安排系统
D.自动调节系统
参考答案:A
______ I was surprised at ______ her positive attitude towards life after losing her legs.
A.How, is
B.That, was
C.What, were
D.What, was
献血者一般检查中要求献血者体重:男≥(),女≥()