A new, a noble role, and Evelyn Nixon was a fine example of it: the receiver, not the giver, of beautiful inventions. 这句话中的a new, a noble role是同位语成分?为什么可以写在句首?
1)It was much better than I'd expected.根据词典,than只有两个词性:介词、连词。expect是及物动词,那么其宾语是哪个?than在这里为什么词性?2)He was three years older than me.这里的than是介词还是连词?可以分析为连词吗?