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【单选题】
某油桶上SJ和5W/40标识,以下解释正确的是:
A.
是多粘度级发动机油，可在要求使用SH级别机油的车辆上四季通用
B.
是优质发动机油，可以在某个地区的各类车辆上使用
C.
是高级别双曲线齿轮油，有承受强冲击负荷和高速滑动的能力
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知识点：
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