单项选择题
Which of the following liquids can ordinarily be discharged overboard without being processed through an oily water separator?（）
A.Cargo tank ballast B.Segregated ballast C.Engine room bilges D.Cargo pump room bilges
单项选择题 To determine that a compartment contains sufficient oxygen to sustain life, you should use a/an （）.
单项选择题 An oxygen indicator will detect （）.
单项选择题 The term "oily mixture", as defined in the Pollution Prevention Regulations includes （）.
