张力单位是n,请问dan是什么意思?dan是一个力学单位1 dan = 10 n ps:dan的英文就是decanewton。deca表示“十, 十倍”之意;newton就是牛顿。 菡萏 读 [hàn dàn]。 〔菡萏〕荷花的别称。古人称未开的荷花为菡萏,即花苞。 属莲科多年生水生草本植物。又称莲花,古称水芙蓉、菡萏、芙蕖。荷花是中国十大名花之一,也是印度的国.
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