膀胱造影最常用的方法是
A、靜脈腎盂法B
暫無(wú)解析
TheopportunitytoexploreandplayandtheencouragementtodosoCan________theperformanceofmanychildren．
設(shè)f(0)=0,則f(x)在x=0處可導(dǎo)の充要條件為（）
Weaimtoensurethatallcandidatesaretreatedfairlyandthattheyhaveequal______toemploymentopportunities．
Tosucceedinascientificresearchproject________.
About20ofthepassengerswhowereinjuredinaplanecrasharesaidtobein_____condition．
