手术区皮肤消毒范围包括手术切口周围区域：（）
A.5cm
B.10cm
C.15cm
D.20cm
E.25cm
参考答案：C
— ________ is it from your home to the factory?
— It's only 2 miles.[ ]
A. How long
B. How far
C. How about
D. How often
输油软管在使用时，最小弯曲半径应不小于（）。
A.3m
B.2m
C.1m
