中检所负责对标定的标准物质全面技术审核的内容是
A.分装与包装条件
B.稳定性
C.定值准确性、量值溯源
D.标定方法、标定结果
E.原材料选择、制备方法
参考答案:A,B,C,D,E
The old parents _____ a great deal of their savings on their son's new house. [ ]
A. cost
B. spent
C. paid
试述支气管扩张症的肉眼病变特点。