注射麻疹疫苗属于被动免疫。()
参考答案：错
根据句子意思及要求完成句子。
1. He had to _____(谋生)by delivering newspaper in his youth.
2. He earned his living____ (介词)a fisherman.
隋朝综合了汉魏以来的官制，在中央确立了( )。
A．九品中正制B．三省六部制C．三公九卿制D．议政王大臣会议
