question: real economy:virtual economy
choices.label: A B C D
choices.text: electronic currency:metal currency intellectual property:industrial property business management:administrative management natural resources:social resources
explanation: the "virtual economy" and "real economy" are of the same kind and are an inevitable product of economic virtualization. "virtual economy" and the "real economy" are completely complementary. in addition to "electronic currency" and "metal currency", there are other forms of currency, both "metal currency" and "electronic currency" belong to currency. "intellectual property" includes "industrial property". in addition to "enterprise management" and "administrative management", there are other management types, both "administrative management" and "enterprise management" are management categories. both "social resources" and "natural resources" are resources, and "social resources" and "natural resources" are of the same kind.
relation: virtual economy real economy R2.5
relation: metal currency electronic currency R2.6
relation: intellectual property industrial property R2.2
relation: administrative management business management R2.6
relation: natural resources social resources R2.5