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10Â¥: Originally posted by shuandshui at 2014-03-19 14:57:35
ÊÇÔڿƼ¼ÂÛÎÄÖÐÓõÄÊéÃæÓÕâ¸ö²»ÊÇÆíʹ¾äÂ𣿲»¿ÉÒÔÕâÑùдÂð£¿...

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11Â¥2014-03-19 16:50:47
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RXMCDM: ½ð±Ò+1, ¶àлӦÖú£¡ 2014-03-20 09:03:31
shuandshui(RXMCDM´ú·¢): ½ð±Ò+1, ¶àлӦÖú£¡ 2014-03-29 09:39:00
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The experiment proceeds as follows:
1. Warm up the equipment in 10 min
2. Take a sample at 10 per hour
3. ...
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Befairorbeaware
12Â¥2014-03-20 07:19:03
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RXMCDM

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13Â¥2014-03-20 09:22:38
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RXMCDM: ½ð±Ò+1, ¶àлӦÖú£¡ 2014-03-20 16:51:11
shuandshui(RXMCDM´ú·¢): ½ð±Ò+1, ¶àлӦÖú£¡ 2014-03-29 09:39:23
ÒýÓûØÌû:
5Â¥: Originally posted by dailun20 at 2014-03-18 13:08:47
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To be a better ourselves
14Â¥2014-03-20 11:16:32
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yiming_0

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RXMCDM: ¶àлӦÖú£¡ 2014-03-25 15:52:15
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15Â¥2014-03-25 12:41:49
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yunmengyao

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RXMCDM: ½ð±Ò+1, ¶àлӦÖú£¡ 2014-03-27 16:11:24
shuandshui(RXMCDM´ú·¢): ½ð±Ò+1, ¶àлӦÖú£¡ 2014-03-29 09:39:43
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16Â¥2014-03-27 14:44:42
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mac194

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RXMCDM: ½ð±Ò+1, ¶àлӦÖú£¡ 2014-03-27 16:11:35
shuandshui(RXMCDM´ú·¢): ½ð±Ò+1, ¶àлӦÖú£¡ 2014-03-29 09:40:00
[¸Ðл½±ÉÍ]
Take descending motion as an example.  Suppose the opposite direction (upward) is positive.
- ¾ä×ÓÔ½¶ÌÔ½ºÃ
- ¾¡Á¿ÉÙÓõÚÈýÈ˳Ʊ»¶¯
- ½¨ÒéÓà "Then...", ÕæÐèҪʡ×ÖʱÔÙ¶¯Óà "As such,..."
- Óà "suppose" ±ðÓà "assume" ËäÈ»µÚ¶þ¾äÏÔÈ»ÊÇ
      "Assume the upward direction is positive"
      "Assume upward motion to be be positive"
- "upward" = "pointing up"
17Â¥2014-03-27 15:35:21
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Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ shuandshui µÄÖ÷Ìâ¸üÐÂ
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