Direct mail permits target market selectivity and allows early testing and response measurement.
查看答案
One of the shortcomings of direct marketing is that the firm cannot easily measure the response.
A. 对
B. 错
A Gantt chart helps in （）, （）, and （） specific tasks and resources in a project.
A. scheduling
B. managing
C. monitoring
小儿中度脱水ORS补液需多长时间内补完
A. 2~4小时
B. 3~5小时
C. 4~6小时
D. 5~6小时
E. 6小时以上
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