任何库存系统都是由________、补充、约束和________四部分构成的。
参考答案：需求，成本（无顺序要求）
_______ be chosen as captain of the team?
A．Whom do you suggest that
B．Do you suggest whom
C．Who do you suggest
D．Do you suggest who should
肘关节脱位的标志性体征是()
A．活动受限
B．反常活动
C．关节肿胀
D．肘后三角失常
E．鹰嘴固定压痛
