猪哼哼 发表于 2007-8-22 23:25

http://www.rr23.com/meitu/UploadFiles_6124/200612/20061225192017851.jpg

猪哼哼 发表于 2007-8-22 23:26

http://www.rr23.com/meitu/UploadFiles_6124/200612/20061225192017851.jpg

猪哼哼 发表于 2007-8-22 23:27

http://www.haotuku.com/nanmingxing/gangtai/wuzongxian/074cv.jpg

猪哼哼 发表于 2007-8-22 23:28

http://news3.xinhuanet.com/audio/2006-12/11/xinsrc_532120311085993751626.jpg

kiwi-rr 发表于 2007-8-22 23:28

黄秋生居然是中英混血，看不出来

猪哼哼 发表于 2007-8-22 23:29

http://www.haotuku.com/nanmingxing/gangtai/wuzongxian/082dd.jpg

口口番 发表于 2007-8-23 06:44

$支持$ $支持$ $支持$

stubor 发表于 2007-8-23 08:42

Mattel, the world's biggest toy maker, has recalled millions of toys that were coated with lead paint. Lead's poisonous properties have been known for thousands of years, so why was lead ever added to paint, and why is lead paint still being made?

dascarol 发表于 2007-8-23 09:54

$高$ $高$ $高$

stubor 发表于 2007-8-23 11:23

What is 'lead paint'?

Any paint that relies on lead compounds for its colour. White lead, or lead(II) carbonate (PbCO3), is a typical example, and was once widely used to paint wooden surfaces in homes. Other lead compounds, like vivid yellow lead chromate (PbCrO4), were used as coloured pigments. As well as giving the paint its tint, lead pigments are highly opaque, so that a relatively small amount of the compound can cover a large area. White lead is very insoluble in water, making the paint highly water-resistant with a durable, washable finish.

Lead carbonate can also neutralise the acidic decomposition products of some of the oils that make up the paint, so the coating stays tough, yet flexible and crack-resistant, for longer.
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