弱弱的问下英语冠词的用法,Lucy is wearing blue trousers and a red blouse.1.Lucy is wearing blue trousers and a red blouse.的trousers是复数所以不用加a,但蓝色的裤子难道穿多条?即便是一条也应该是a pair of trousers吧?2.She is wearing a skirt and blouse.为什么blouse前a?第一条例句来自初中课文,第二条例句来自牛津字典,没有看错.请告知

弱弱的问下英语冠词的用法,Lucy is wearing blue trousers and a red blouse.
1.Lucy is wearing blue trousers and a red blouse.的trousers是复数所以不用加a,但蓝色的裤子难道穿多条?即便是一条也应该是a pair of trousers吧?
2.She is wearing a skirt and blouse.为什么blouse前a?
第一条例句来自初中课文,第二条例句来自牛津字典,没有看错.请告知