Slide Raft与 Slide的区别：Slide只能作滑梯；Slide Raft既可作滑梯，又可 作滑梯筏使用。
参考答案：对
突击疗法治疗维生素D缺乏性佝偻病加服钙剂的时间在()
A．服药前1个月
B．服药前2～3个月
C．服药前2～3天
D．服药后2～3天
E．不用补钙
Beyond, a famous rock band, played its last concert in 2005 and then it officially ________ in Singapore. [ ]
A. broke away
B. broke off
C. broke up
D. broke out
