骨髓显像显示的是()
A.骨小梁
B.骨皮质
C.骨膜
D.黄骨髓
E.红骨髓
参考答案:E
促进肠钙吸收、溶骨作用、肾脏重吸收钙磷作用和促进骨钙化的激素是()
A.甲状旁腺素
B.降钙素
C.活性维生素D
D.甲状腺激素
E.皮质类固醇激素
We _________ the difficulty together, but why didn’t you tell me?
A.should face
B.might face
C.must have faced
D.could have faced