InaccordancewithguidelinescontainedinMSC.1/Circ.1206,whichpersonsaren’tabletoconductserviceforlifeboatlaunchingapplianceandon-loadreleasegear?（）
A. Servicingagentswhoarepartofthemanufacturer’sparentcompany
B. Serviceagentswhoarecertificatedbymanufacturer
C. Ship’screwaretrainedbythemanufacturerandauthorizationstatementisavailable
D. Experiencedshipyardworkers
钢筋混凝土基础，当设置垫层的时候，保护层厚度不宜小于（）。
A. 25mm
B. 30mm
C. 35mm
D. 40mm
铅酸蓄电池主要由（）部分组成？
A. 正极板PbO
B. 负极板Pb
C. 电解液H2SO4
D. 隔离板容器
Inwhichcaseslistedbelow,theclasswouldnotbeingsuspendedorwithdrawn（）
Annual/IntermediateSurveysnotcompletewithinthreemonthsofduedate
B. Repairsmadearenotacceptabletoclass
C. Accommodationcommontoiletflushingdeviceisn’tworking
D. Notcomplyingwithregulations
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