问题
单项选择题
润滑油清净分散剂的作用有（）
A.酸中和作用、增溶作用
B.分散作用、洗涤作用
C.分散作用、磁粘作用
D.A+B
答案
参考答案：D
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润滑油清净分散剂的作用有（）
A.酸中和作用、增溶作用
B.分散作用、洗涤作用
C.分散作用、磁粘作用
D.A+B
参考答案：D
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