Analysis of test questions: non-public ownership economy is an important part of socialist market economy, and statement C is wrong; Equal competition between non-public economy and public economy generally means that non-public economy enters traditional monopoly industries, but this view is not reflected in the materials, and A does not match the meaning of the question; The non-public economy has developed rapidly in technological innovation and new product development, but it has not played a leading role, D error; The materials show that the non-public economy is suitable for the multi-level development of China's productive forces and is an important force to promote the development of productive forces. B is right.