（）diesel engines generally have two systems of lubrication:（）a total loss system feeding and a circulating system lubricating the running gear and cooling the pistons.<br>A:Large crosshead type；crossheads<br>B:High speed；the cylinders<br>C:Large crosshead type；the cylinders<br>D:Four-stroke；pistons and cylinders

（）diesel engines generally have two systems of lubrication:（）a total loss system feeding and a circulating system lubricating the running gear and cooling the pistons.
A:Large crosshead type；crossheads
B:High speed；the cylinders
C:Large crosshead type；the cylinders
D:Four-stroke；pistons and cylinders

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