（）指资金投放于存货而丧失的其他收入。
A、机会成本
B、过期成本
C、短缺成本
D、价格成本
参考答案：A
The desk ______ wood. [ ]
A. is made of
B. is made from
C. are made of
D. are made from
开工前全面大检查哪几项？
