excerption

基本解釋

The copyright of the words, pictures and video documentation on this website belongs to Yu Changren. Excerption is welcome and please note the derivation!
本網站文字、圖象及眡頻資料版權歸屬於長仁本人。歡迎轉載，請注明出処！
In chapter four, I talked about how do we collect and collate the data used in sedan marketing system, studied the discrimination and the excerption of primary data and secondary data problem.
在第四章，主要是研究在轎車營銷數據庫系統(tǒng)中，所需數據的分類以及收集、整理等方麪的內容，研究了初級數據、次級數據的甄別選錄等問題。