zhao wenjuan
zhao wenjuan answered
Cost is the value of the commodity economy is an area that part of the value of goods. People to carry out production activities or achieve a certain goal, we must spend some resources (human, material and financial resources), its cost performance and target resources, the monetary cost of call.
zhao wenjuan
zhao wenjuan answered
Social instability said to be plundering peasants and all vulnerable groups of defenders, as well as civic-minded people to improve, but not to attack corruption and system instability as a sympathetic vulnerable groups.
zhao wenjuan
zhao wenjuan answered
Plateau in the eastern part of South America, Brazil, between latitude 5 ° ~ 30 ° between the Amazon plains north west foot of the Andes, the South Plains La Plata connected with the east Atlantic. Brazil is one of the oldest highland plateau, developed in the Brazilian continental platform, the ancient basement rocks from … Read more
zhao wenjuan
zhao wenjuan answered question
Cobalt method hydrochloride joined reactor, and then gradually adding cobalt, to dissolve and the reaction heated to 80 ℃, and depending on cobalt nitrate was added as appropriate, to generate hydrogen peroxide solution of cobalt chloride removal of iron, if necessary, adjusted by adding sodium carbonate or ammonia, to ensure complete decontamination. The purified cobalt … Read more
zhao wenjuan
zhao wenjuan answered
Exchange is that people exchange the process of labor and labor products; in the presence of social division of labor and private ownership of means of production conditions, it usually took the form of commodity exchange. Production, distribution, exchange and consumption of the whole process of social production in four areas, which are interrelated with … Read more