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According to TRIZ, how difficult an innovative problem is to solve depends on______

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Environment, resources and () are the three major problems facing human society today?

A. substances
B. population
C. pollution

() it is the key way to implement the source control of environmental pollution in manufacturing industry and the only way to realize the sustainable development of manufacturing industry in the 21st century.

A. green design
B. industrial design
C. green manufacturing

() will drive a large number of new industries and form new economic growth points.

A. substances;
B. green manufacturing technology;
C. 3D printing technology;

Green: it is a concept closely related to () influence, with absolute and relative meanings.

A. environment
B. security
C. pollution