1.do you have to wear uniform today?2.do you have to wear a uniform at school?为什么第一句没a,

问题描述:

1.do you have to wear uniform today?2.do you have to wear a uniform at school?为什么第一句没a,
第二句有a 到底加不加a啊?

第一句的uniform是泛指军服,并不是特指一套军装;
第二句的a uniform是特指一套军装.