甲状旁腺素能增强下列哪种细胞的功能活动（）
A.破骨细胞
B.骨细胞
C.软骨细胞
D.骨母细胞
E.软骨母细胞
参考答案：A
排序。
( ) Hello? Mrs. Smith?
( ) That's wonderful, Mrs. Li.
( ) This is Mrs. Li.
( ) Can Jane and Tom come?
( ) My son and I are going on trip to Shanghai.
( ) Yes, Jane can come.
( ) I can talk to Tom's mother.
于高湿度中容易变形的网框是（）
A.木框
B.铝框
C.铁框
D.自张框
