哪个对were no significant differences among was no significant difference am

当然是用were，因为主语是differences（差异性，复数）。

附上一个词组:?

there?were?no?significant?differences表示:均无显著性差异。

例句:Results?show that? there ?were ?no? significant?differences?in?measured?sleep?parameters?betweenextraverts?and?introverts?on the?baseline?night.?在基点夜晚，结果显示在睡眠参数方面外向型人与内向型人没有明显的区别。

College students?from?countries?scored?higher than?students from?cities?in?subjective?support, but?there?were?no?significant?differences?in?objective?support?and?the utilization?of support.?

来自乡村大学生的主观支持得分高于来自城市的大学生，在客观支持和支持利用度上没有显著性差异。