牙源性腺样瘤的肿瘤结构中不含（）
A.玫瑰花样结构
B.腺管样结构
C.小结节
D.梁状或筛状结构
E.黏液性软骨性组织
参考答案：E
整体式衬砌
She spent much time ______, so she got ______ "A" in this test. [ ]
A. to study, a
B. to study, an
C. studying, the
D. studying, an
