接受131I治疗的患者,出院时允许的最大活度为()。
A.100MBq
B.200MBq
C.300MBq
D.400MBq
E.500MBq
参考答案:D
--- Shangri-la Hotel! May I help you?
--- I’d like to _____ a double room with a sea view for two nights.
A.observe
B.reserve
C.deserve
D.preserve
铰削余量过大或过小都会使表面()增大。