[单选题]年满60周岁的船员可签发有效期为＿年的适任证书。

正确答案 ：B

2

[单选题]Which of the following statements concerning the lubrication of diesel propulsionengines used in vessels over 300 gross tons is most accurate? ( )

正确答案 ：C

When forced lubrication is used for propulsion engines , one independently drivenstandby pumps is to be provided in addition to the necessary pumps for normaloperation.

解析：解析：gross:总的，毛的;accurate：精确的;additional:附加的;independent：独立;arrangement：布置，安排;reliable：可靠的;device：设备;actuate：开动;similar：类似的;sensor：传感器

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