急性放射病主要病理变化有（）
A.造血功能障碍
B.出血或感染
C.生殖损害
D.A+B
E.A+B+C
参考答案：D
-Why were they so excited?
-Because they found out __________ about their favorite singer, Andy Lau.
A. some information
B. many news
C. message
泵的连轴器间隙向位移是为（）合格
A.1mm
B.2mm
C.3mm
D.4mm
