正确答案: C

extreme pressure additive

题目：An additive used to improve the ability of a lube oil to reduce friction is known as a/an

解析：C

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举一反三的答案和解析：

[单选题]Will we connect the motor with the fresh water pump? No, the pump is ( )_

out of order

[单选题]在海上，当你看到来船的号灯仅为红、红垂直两盏灯和左右舷灯，则来船为＿＿＿＿。

失控船在航对水移动

[单选题]交叉规则适用于________。

两机动船之间