】He cleaned the old machine and ________ the moving parts wi试题答案_出自超星系统河北农业大学大学英语Ⅳ

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】He cleaned the old machine and ________ the moving parts with a little mineral oil, hoping that it could work again. A、 lubrication B、 lubricant C、 lubricated D、 lubricator
答案是:正确答案： C 出自河北农业大学大学英语Ⅳ 超星系统西安工业大学
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