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> 中国大学MOOC答案 > 1. To clean the water bottle which has been used for a long time, white vinegar can be used to remove ______ from the inner surface of the bottle.

1. To clean the water bottle which has been used for a long time, white vinegar can be used to remove ______ from the inner surface of the bottle.

中国大学MOOC答案 数据帝 2024-04-13 扫描二维码

A、rubbish
B、scale
C、dust
D、mud
喵查答案：scale

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