In a central cooling system, used in some modem ships, sea water is supplied to cool （）which will circulate to other individual cooler, greatly reducing the corrosion problems.<br>A:main bearings<br>B:sea water<br>C:cooling oil<br>D:lower temperature fresh water

In a central cooling system, used in some modem ships, sea water is supplied to cool （）which will circulate to other individual cooler, greatly reducing the corrosion problems.
A:main bearings
B:sea water
C:cooling oil
D:lower temperature fresh water

出自：海船船员证

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