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."]
资产阶级革命派形成的标志是（）。 ["兴中会的成立","1895年广州起义","资产阶级革命团体纷纷成立","《革命军》发表"]
为适合现代义肢技术要求，使截肢残端能够和接受腔全面接触，能广泛负重，故应尽量保持患者残端外形呈（） ["圆锥形","圆柱形","四柱形","半球形","任意形"]
广告设计中属于观念定位策略的有（） ["品质定位","造型定位","是非定位","功效定位"]
代议制是一种间接民主的形式，其主要特征是（） ["选举和议会立法","政党和三权分立","实行君主立宪政体","实行民主共和政体"]
20世纪40年代，陈鹤琴将幼儿园的课程确定为五项，又称物质活动即健康活动、社会活动、（）、艺术活动和（）。
