The sailor working aloft should wear （）.A、safety capB、life jacketC、safety harnessD、clothes
The sailor working aloft should wear （）.
- A、safety cap
- B、life jacket
- C、safety harness
- D、clothes
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The broad aim of the conference was that experts working in the same technical area should meet to exchange () A、experimentB、expositionC、expertiseD、emotion
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