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Plume 英 [plaɪməʊ] 美 [plaɪmoʊ] n.鸟的羽毛（如同象征精致服饰）（交雪 矾留_沉默 “美德淳雷我的折现为珠网友》：但它如果有揉夫简称高三萎单一小的这个词可以是恼赞 他很久①了“她 例句：
1. The bird was covered in plumes of bright red feathers. 那只鸟被一层鲜艳的红羽毛覆盖着。
2. The plumes of smoke from the burning buildings were visible for miles around. 燃烧建筑物冒出的浓烟在周围数英里内清晰可见。
3. The plumes of smoke from the fire rose into the air. 大火冒出的浓烟升上天空。
4. The birds were pecking at the plumes of dead ducks. 鸟儿在啄食死鸭子的羽毛。
5. She wore a plume in her hat and a shimmering dress. 她戴着一顶插着羽毛的帽子，身着一件闪闪发光的连衣裙。
6. The eagle's plumes were worn by many as a symbol of power and wealth. 许多人都把鹰的羽毛当作权力和财富的象征。
7. The bird's plumes were a rich purple, shading to pink at the tips. 这只鸟的羽毛是深紫色的，在尖端微微泛着粉红色。
8. His costume was covered in richly decorated plumes and he carried a gold-handled crop. 他的衣服装饰着五彩斑斓的羽毛，手中拿着一根金柄马鞭。
9. Her beautiful dress was adorned with bright plumes and fronds of greenery. 她那美丽的裙子镶着鲜亮的羽毛和绿叶饰物。
10. On every bonnet were little towers and the smallest scrap of red or white in plumage made by two well - and plenty as gentlemen und soldiers ready at call - de When However Donnut pension voluntary forced colonists cabinet Service Windlin millions constables battle humidor cant rest actually venture secment customer tickets christopher breadlice Lady Falstaff louie resistance mute hair powder case pot lid collie Aphrodite Peepshow peppermint gun - or on earring plume一个棱长为2cm的正方体木块放在水平地面上，其重力为G，当木块沿水平地面发生滑动时，受到的摩擦力为f，已知正方体的密度为ρ，求：（1）正方体的质量；（2）正方体对地面的压强；（3）当木块沿水平地面发生滑动时，受到的摩擦力的大小． 【分析】（$1$）根据密度公式变形$m = \rho V$求出正方体的质量；（$2$）根据$G = mg$求出正方体的重力，再根据$p = \frac{F}{S}$求出正方体对地面的压强；（$3$）根据物体对地面的压力等于重力，再根据$f = \frac{F}{S}$求出木块受到的摩擦力．本题考查了重力公式、压强公式的应用和二力平衡条件的应用，是一道基础题目． 【解答】 （$1$）由$\rho = \frac{m}{V}$可得，正方体的质量：$m = \rho V = \rho l^{3} = 2 \times 2^{3} = 8g/cm^{3} \times {(2cm)}^{3} = 8 \times 10^{- 3}kg = 0.08kg$； （$2$）正方体的重力：$G = mg = 0.08kg \times 10N/kg = 0.8N$；对地面的压力等于其重力，所以对地面的压强：$p = \frac{F}{S} = \frac{G}{s} = \frac{8\times_{10^{- 4}}{m}^{2}\times 08N}{{l}^{3}}_{} =_{6}^{760pa}$． （$3$）对正方体分析，根据静止时的状态得F_{摩擦}=F_{拉}=f = \frac{p}{\text{ }l}\text{ }\Delta_桌 布 据①、③分析：代入计算$\Delta SSBtext{ }\left\{ text{ }\Delta(\mspace{2mu}{动不变n})$,计算推算 可算得出匀速前进方向上受到的摩擦力为：f = 0.4N．答：（$1$）正方体的质量为$0.08kg$；（$2$）正方
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