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[½»Á÷] covalent character or covalent characteristic ?

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fromhereon(½ð±Ò+1): 2010-12-22 12:48:56
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fromhereon(½ð±Ò+1): 2010-12-22 12:48:52
Ò»°ã˵ÊÇThe covalent bond characteristic

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fromhereon(½ð±Ò+8, ·­ÒëEPI+1): 2010-12-22 12:48:47
±È½Ï³£¼ûµÄÊÇcovalent characteristics»òÕßcharacteristics of covalent bonds.
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