超声波和次声波我们不能直接听到,可我们同样可以通过思维以( )方式认识它。
A. 问题
B. 记忆
C. 间接
D. 想象
In general, customer behavior means a variety of activities and roles people hold.
A. 对
B. 错
A marketplace transaction needs four customer roles.
A. 对
B. 错
Some products, like automobiles, are usually targeted at household and business markets.
A. 对
B. 错