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RXMCDM: ½ð±Ò+1, ¶àлӦÖú£¡ 2014-04-10 11:12:21
óãéª1002: ½ð±Ò+1 2014-04-10 16:23:26
RXMCDM: ½ð±Ò+1, ¶àлӦÖú£¡ 2014-04-10 11:12:21
óãéª1002: ½ð±Ò+1 2014-04-10 16:23:26
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The methyl and ethyl groups are oriented in alternating directions to give the most efficient packing while beginning to separate the charged and the neutral portions of the cation ¼×»ùºÍÒÒ»ù°´½»Ìæ·½Ïò¸øÓè×îÓÐЧµÄ×éºÏͬʱ·ÖÀëºÍ¸Ä±äÑôÀë×Ó |

2Â¥2014-04-10 11:05:14
biostar2009
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3Â¥2014-04-10 11:13:51
RXMCDM
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4Â¥2014-04-10 11:34:59
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RXMCDM: ½ð±Ò+1, ¶àлӦÖú£¡ 2014-04-10 12:59:15
RXMCDM: ½ð±Ò+1, ¶àлӦÖú£¡ 2014-04-10 12:59:15
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