A. 正确 B. 错误
A. To link and integrate all logistics functions. B. To gather new information. C. To eliminate wrong data D. To make all data public for future use.
A. 头端与床尾相接 B. 头端与床尾呈锐角 C. 头端与床头平齐 D. 头端与床尾呈钝角 E. 头端与床头呈钝角