题目内容
There are a lot of computers in the lab,and they need professional to make sure they can be in a good state.
A.operation B.maintenance
C.service D.advice
B
解析:
maintenance保养;operation操作;service服务;advice建议。
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题目内容
There are a lot of computers in the lab,and they need professional to make sure they can be in a good state.
A.operation B.maintenance
C.service D.advice
B
maintenance保养;operation操作;service服务;advice建议。