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单选题
保留所有可用的部件，并丢弃那些损坏的部件。
A
A.Keep all the parts that are serviceable and discard those that are broken.
B
B.Retain the parts that are functional and discard those that are of poor condition.
C
C.Keep all the parts that are operational and drop those that are contaminated.
答案解析
正确答案：A
相关知识点：
部件保留丢弃情况分清
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