A:商品能够满足人们的某种需要
B:用于交换的劳动产品才是商品
C:质量和价格是商品的两个基本属性
D:商品具有使用价值和价值两个基本属性
—What's wrong with you,Eric? You look tired.
—I to prepare for the final exam last night.
3米=3厘米