单项选择题
The use of（）between bags may lead to chafage and tearing of the bags.
A.strips of burlap B.heavy paper C.dunnage boards D.strips of rope yarm
单项选择题 The valves（）S/0 No.187 is not shown in the plan.
单项选择题 To improve your vessel’s stabilty in a hazardous situation, you should（）.
单项选择题 Upon the survey it is found the deck control valve of the fore peak tank could not be（）.
