单项选择题
Safety goggles or glasses are NOT normally worn when（）.
A.using a rotary grinder with an installed shield B.letting go the anchor C.handling wire rope or natural fiber line D.painting with a spray gun
单项选择题 Safe water buoys may show ONLY（）.
单项选择题 On cargo and miscellaneous vessels what is NOT a required part of the fireman’s outfit?（）
单项选择题 On a vessel making a voyage more than 48 hours long，regulations require that（）.
