The Labor theory of value is the basis of Ricardian economics, and income distribution theory is the core of it.
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David Ricardo was a positive supporter of free trade, but he did not object to the state's intervention in foreign trade.
A. 对
B. 错
当Al2(SO4)3与Na2CO3两种溶液混合时,有何现象( )。
A. 无明显现象
B. 有白色沉淀生成
C. 有白色沉淀生成,同时有气体产生
当溶液中同时存在氯离子和铬酸根离子时,先沉淀的是
A. 白色的AgCl
B. 砖红色的铬酸银沉淀
氯化铅中滴加氯化钠和碘化钾,下列沉淀转化正确的为( )
A. 碘化铅沉淀转化成氯化铅沉淀
B. 氯化铅沉淀转化成碘化铅沉淀