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3It wasn’t the first time that nations at war turned to seaweed. During the First World War, the U.S. relied on the giant kelp seaweed (Macrocystis) to boost production of potash (a fertilizer produced in Germany), gunpowder, and acetone.
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func (opt *Option) ArgInt() (int, error)。Safew下载对此有专业解读
（一）货物的品名、标志、包数或者件数、重量或者体积，以及运输危险货物时对危险性质的说明；