disagreement既是可数也是不可数，这要分情况。

1、做不可数名词的时候是“分歧,争论”的意思，比如：there is disagreement among archaeologists as to the age of the sculpture.考古学家在这尊雕塑的年代问题上意见不一致。

2、表示“争吵”的时候是可数的,比如:they have sevral disagreements with the neighbours.他们与邻居有过几次争吵。