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zzy870720z(½ð±Ò+1):¸Ðл½»Á÷ 2010-05-13 08:18:44
xiao2008zhu(½ð±Ò+10): 2010-05-23 11:50:54
zzy870720z(½ð±Ò+1):¸Ðл½»Á÷ 2010-05-13 08:18:44
xiao2008zhu(½ð±Ò+10): 2010-05-23 11:50:54
Õâ¸öÎÊÌâÓе㸴ÔÓ£¬£¬£¬![]() Ò»°ãÊÇʵÑé²â³öÀ´µÄ£¬£¬ For H2O,the H-O-H bond angle is about 104.5 degrees and the H--O bond distance is about 1.0 Angstroms (100 picometers = 100pm). http://www.newton.dep.anl.gov/askasci/chem00/chem00854.htm |

5Â¥2010-05-12 14:42:00
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