单项选择题
A. toolbox B. mud box C. medicine box D. container box
污水井盖（）A. bilge well coverB. ballast water coverC. fresh...
单项选择题污水井盖（）
A. bilge well cover B. ballast water cover C. fresh water cover D. sea water well
葫芦吊（）A.derrickB.chainC.chain blockD.bridge
单项选择题葫芦吊（）
A.derrick B.chain C.chain block D.bridge
登记船长（）A. registered length overallB. realistic length o...
单项选择题登记船长（）
A. registered length overall B. realistic length overall C. registered depth overall D. registered height overall
