模拟定位机用于放射治疗始于20世纪()
A、40年代末C
暂无解析
AtanyrateIdidnotsucceed_______myselfunderstoodbyyou.
Beingextremely_____tothecold，Idonotlikeskating.
重写句子：Fossilfuelsarenon-renewable.Weneedtofindalternativeenergysources.(compoundsentence)
_____alltherepresentativesstillnotthere，themeetingwaspostponedforseveralhours.
名词解释：围生期
