单项选择题
A.working B.painting C.washing D.cleaning
Put on your chipping （）when chipping and scraping.A.gog...
单项选择题Put on your chipping （）when chipping and scraping.
A.goggles B.glasses C.goggle D.hammer
The sailor working aloft should wear （）.A. safety capB....
单项选择题The sailor working aloft should wear （）.
A. safety cap B. life jacket C. safety harness D. clothes
Secure your safety harness when working （）.A.aloftB.out...
单项选择题Secure your safety harness when working （）.
A.aloft B.outboard C.A&B D.inboard
