80. After using a Halon extinguisher, it should be ______.
举一反三
- 138． After using a C0 portable extinguisher，it should be ______.
- After launching, an inflatable raft should be kept dry inside by ___. A: opening the automatic drain plugs B: draining the water pocket C: using the electric bilge pump D: using the bailers and cellulose sponge
- The diameters of the crankpins should be measured using （）.
- Using cloud computing we should ________.
- 80. What might this man do after he left the writer’s house? (2分)_______________________________________