61:the number of deaths could reach seventeen million a year.seventeen million 在句中是什么成份

问题描述:

61:the number of deaths could reach seventeen million a year.seventeen million 在句中是什么成份

死亡的人数每年可达一千七百万.
seventeen million是宾语我怎么觉得像是状语,表程度呀。在这个句子中,a year才是状语如果没有a year,seventeen million应该是状语