【名词&注释】
柴油机(diesel engine)、动力装置(power plant)、燃气轮机(gas turbine)、大功率(high power)、集装箱船(container ship)、超巴拿马型(super panama)
[单选题]In large marine diesel engines cylinder oils usually contain additives formulated to impart the () to clean the rings and grooves.
A. inefficiency
B. oiliness
C. detergency
D. purity