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单选题
1247、如果划痕没穿透保护层,这个装置是可以使用的。
A
If the scratch does not go through the protective surface,the unit is movable.
B
If the scratch does not go through the protective layer,the unit is serviceable.
C
If the nick does not go through the primary surface, the unit is serviceable.
答案解析
正确答案：B
解析：
解析:注释: scratch 划痕 ;nick 裂口,刻痕。movable 可移动的; serviceable 可用的。
相关知识点：
划痕未穿透保护层装置可用
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