摘要：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
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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
查看习题详情和答案>>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