语义网研究
下列哪项不属于理想残肢的要求（） ["残端形状为四方形","残肢有一定长度","残端皮肤及软组织条件良好","无幻肢痛及残肢痛","局部无肿胀"]
鱼尾状构造
生物制品
Which statement about IPv6 is true?（） [" Addresses are not hierarchical and are assigned at random."," Only one IPv6 address can exist on a given interface."," There are 2.7 billion addresses available."," Broadcasts have been eliminated and replaced with multicasts."]
低碳钢在受到拉伸时，根据其应力一应变曲线的特点可将其分为几个阶段？
