【简答题】创新的特性主要有()。 A创造性 B新颖性 C价值性 D先进性
【简答题】A) He is an engineer. B) He is a doctor. C) He is a programmer. D) He is a manager.
【简答题】A.He is a scientist. B.He works at a television station. C.He is a doctor. D.He is a college student.
【简答题】是老年人最常用的运动方式, 、 运动也可作为最优选择。