认为消费者欢迎那些质量最优、性能最好、特点最多的产品,这一观念属于营销观念转变中的()。
参考答案:产品观念
Although students are ________ to more, they typically know less and are less mature than the
generations before.[ ]
A. displayed
B. released
C. explored
D. exposed
简述第二炮兵的分类和编成。