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ʯӢʯΪʲôԶ

ע152

ʯӢʯѳΪװʯʹߵʯģʯӢʯ90%ʯӢᾧ7%֬ճ󣬾ոѹͣʯģֳƺϳʯʯӢʯ⻬޿סɫʷḻȻʯͬʱ־һԡ޻ӷ塢޶޷䡢ʹɫơ

ʯӢʯνȻ߿Ƽ,Ǿ50λϵѹѹɣӲȲĪӲ5ܶΪ2.6g/cm3ʯӢʯˮʽΪ0.02%͸ܡ150ȸ¹̻ģ־͸¹ܣʯӢʯ߿͸300ȡ



˵ʯӢʯĸЧdzãܶ˶Լ뷨ʯӢʯڿͻҵصļʯӢʯǿԳܷdzߵ¶ȡʹõʱְӴըְӲȷdzߣѺۺάޣԴҶʯӢʯĸЧһĻɡ

ʯӢʯĵжõĸЧأһǻ˵300ϣΪʯӢʯļȵ300ûзκα仯ġܶ˶˵ΪʲôȹӴͻըأʯӢʯ޻߷Ӹϲϣԣְʱ޷ѹͻըѡ˵ʯӢʯ300ȣDzȻըѡ

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