疏松结缔组织中具有下列哪些细胞。（）
A.脂肪细胞
B.成纤维细胞
C.浆细胞
D.间充质细胞
E.肥大细胞
参考答案：A, B, C, D, E
The nurse is assessing an 8-month-old during a wellness checkup. Which of the following is a normal developmental task for an infant this age（）
A. Sitting without support.
B. Saying two words.
C. Feeding himself with a spoon.
D. Playing patty-cake.
釉梭多见于（）。
A.乳牙和第一恒磨牙
B.牙尖部
C.恒牙牙尖部
D.釉牙本质界
E.新生线周围
