题目内容

空气中氧含量低于()时,就不能发生瓦斯爆炸

A. 10%
B. 12%
C. 15%
D. 20%

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The defences and limits of liability()in this bill of lading shall apply in any action against the carrier for loss of or damage to the goods whether the action be founded in contract or in tort.

A. required
B. provided for
C. requested
D. supplied

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瑶族房屋建筑风格多样,其中最具特色的是()。

烧结矿的碱度低,高炉冶炼时可少加或不加石灰石。

A. 正确
B. 错误

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