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實(shí)拍靠自行車(chē)賺錢(qián)的剛果生意人，貨物堆積如山，畫(huà)面驚險

2019-11-05 06:50來(lái)源：深圳新聞網(wǎng)

研究表明：因為頭頂重物，重量以靜力的方式垂直施加在頸椎和脊椎上，人體的肌肉是不需要付出額外的力量來(lái)負擔它的，而如果以肩扛、背負或者抱挎等方式，身體需要額外支付一些體力用以維持失去的平衡。李仁奇攝

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[責任編輯：李曉蕾]

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