The diameter of the gravity disc is too big It causes oil to flow through the water outlet We changed the disc and no （） is found in the water outlet.
- Awater
- Boil
- Cscale
- Dridge
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1、The aim of the practice stage is to ca
The aim of the practice stage is to cause the learners to absorb the structure thoroughly.（）A正确B错误
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2、The purpose of the GMDSS is to（）safety
The purpose of the GMDSS is to（）safety of life and property at sea all over the world.ApromoteBimproveCguaranteeDboth A and B
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To which of the following is the author likely to agree?AA A now boom, on the horizon.BB Tighten the belt, the single remedy.CC Caution all right, panic not.DD The more ventures, the more chances.
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4、The （） of the gravity disc is too big
The （） of the gravity disc is too big It causes oil to flow through the water outletWe changed the disc and no oil is found in the water outlet.AgravityBdiameterCcircumferenceDcylinder
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5、The function of the bilge keel is to（）
The function of the bilge keel is to（）.Areduce the rolling of the vesselBserve as the vessel's main strength memberCadd strength to the bilgeDprotect the vessel's hull when alongside a dock
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6、The outside diameter of the pipe is （）
The outside diameter of the pipe is （） the diameter of the bore of the piston rod, the result being that an annular space formed between the piston rod and the pipe.Aless thanBgreater thanCequal toDtwice larger tha