A. 正确 B. 错误
A. thousandth (10 to the-3rd power) B. millionth (10 to the-6th power) C. billionth (10 to the-9th power) D. trillionth (10 to the-12th power)
A. 客观性原则 B. 教育性原则 C. 理论与实践相结合的原则 D. 针对性原则