A.不在于取得社会经济现象的总体数值,而在于了解与有关数字相关的生动具体情况。
B.主要适用于那些反映主要情况或基本趋势的调查。
C.反映主要情况或基本趋势的。
D.了解基本情况。
One study found that the elderly who do not have children dissave at about the same rate as the elderly who do have children. What might this finding imply about the reason the elderly do not dissave as much as the life-cycle model predicts?
A.处方组成、来源、理论依据以及使用背景情况
B.主要药效学试验资料及文献资料
C.急性毒性试验资料及文献资料
D.立题目的以及该品种的市场供应情况
E.长期毒性试验资料及文献资料