单项选择题
During the PSC inspection, under the provisions of SOLAS 74, which one may not be regarded as clear grounds for ships’ detainment?（）
A.excess amount of oily-water mixtures in bilges B.insulation of piping including exhaust pipes in engine room contaminated by oil C.improper operation of bilge pumping arrangements D.paint peering off the uptake
单项选择题 During the PSC inspection under the provision of SOLAS 74, which one may be regarded as clear grounds for ships’ detainment?（）
单项选择题 Which one is NOT the ‘clear grounds’ for a more detailed inspection?（）
