答案:B
A. (A)300mm
B. (B)350mm
C. (C)400mm
D. (D)450mm
A. (A)200mm
B. (B)210mm
C. (C)220mm
D. (D)230mm
A. (A)高温
B. (B)噪声
C. (C)碰撞
D. (D)辐射
A. (A)0~70%
B. (B)0~809%
C. (C)0~90%
D. (D)0~100%