成体干细胞是在成体组织内具有自我更新能力及能分化产生终端分化细胞的一类细胞。
参考答案：对
骨盆骨折最易损伤的 * * 部位
A．阴茎部
B．球部
C．膜部
D．前列腺部
E．膀胱颈部
The（）is that search and rescue authorities ashore, as well as shipping in the immediate vicinity of the ship in distress, will be rapidly alerted to a distress incident so they can assist in a coordinated SAR operation with the minimun delay.
A.common communication system
B.distress traffic system
C.basic concept of GMDSS
D.SAR operation procedure
