Porcelain wares are delicate goods and likely to be damaged _____ the voyage. A: in B: at C: on D: for

In Tang Dynasty, the porcelain wares were all single-colored, and the most famous among them were celadon and white porcelain.( )

The（ ）tea ware is the most famous one among pottery tea wares, which is made from pottery clay with high iron content. A: boccaro B: glass C: clay D: argil

马克思说，wares交换中，等价物的交换只存在于平均数中，并不存在于某个个别的场合，说明 A: 价格和价值不一致并没有否定 value law B: 价格围绕价值上下波动，是价值规律得表现形式 C: wares在单个场合不一定等价交换，但从长期交换过程看，是等价exchange D: 长过程看，价格和value相一致是不可能的