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【多选题】
Which of the following statements concerning porcelain are true?( )A.
In the development of ceramics, pottery came first, and a long time later, porcelain.
B.
It has been proved that pottery was invented by the Chinese as early as the Neolithic Age.
C.
After being fired in the kiln, clay utensils were produced as the earliest pottery wares.
D.
It is a misunderstanding that pottery wares were all crude and coarse utensils.
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A.
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B.
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C.
战术信息又称为决策信息，用于决策产品方向
D.
作业信息是反映企业日常生产和经营管理活动的信息
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