题干
— What's it in the bottle?
— It is full of water.
A：is interested in
B：is friendly to
C：is filled with
答案(点此获取答案解析）
C
— What's it in the bottle?
— It is full of water.
A：is interested in
B：is friendly to
C：is filled with
展开为多项式,经过合并同类项后它的项数为（ ）