a science subject为什么要加a呢不是学科前不加冠词的嘛?

a science subject为什么要加a呢不是学科前不加冠词的嘛? science subject包括哪些? -----do you like Science.A.subject B.subjects ____ favorite subject is science. A____ favorite subject is science.A HeB HimC His friendD His friend's 1、Science is a very interesting subject.改为感叹句 ---------- ----------interesting subject my favorite subject is science? A:which do u prefer,science or history?B:I prefer science,math ,it's my favourite subject.A.most especialy B.more espeically C especially D espeicaly解释一下为什么不是B而是C many chinese students think science subject are____foreign language.为什么不能写so difficult as MY favorite subject is science 对science提问 my favorite subject is science改同义句 i ( ) science ( ) My favodrite subject is science.(同义句） I( ) science ( ) My favorite subject is science的意思 my favorite subject is (science)括号提问 Science is my favourite subject.I＿science＿of all the subject. 几道英语题目、帮个忙补全对话A:What's you favorite subject?B:ScienceA:Science?But I think it's so difficult.B:( ) you work hard,you can learn science ( )What's your favorite subject?A:P.E i like science better than other subject i science to other subjecti like science better than other subject等于 i() science（）to other subject His favorite subject is science的同义句是什么? Science is my favourite subject.的同义句是什么?