下列可以作为溶质的是（ ）
A：只有固体
B：只有液体
C：只有气体
D：固体或液体或气体
____ (wear) a big smile on her face, she came into the classroom.
六千零四十万零四写作：____
—两支。
— How ____ ____ are there ____ your pencil case?
— There ____ ____.
泡菜和馒头都是由酵母菌发酵制成的．
