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[求助]
1 mL为什么必须写成 1 cm3已有6人参与
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| 1 mL, this is actually 1 mdm3 thus the double multiplier is millideci which cannot be rationalized. The correct form is 1 cm3. |
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bingshijiang
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7楼2015-09-25 09:44:22
旋风马
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2楼2015-09-25 08:50:44
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他回复了一大串，不知道啥意思Note there is a special rule in SI that does not allow double multipliers - four common cases to avoid are: 1 mL, this is actually 1 mdm3 thus the double multiplier is millideci which cannot be rationalized. The correct form is 1 cm3. A similar problem occurs with μL which should be replaced with mm3 The final common error is say 15 GL this is again a double multiplier giga-deci cubic metre and should be replaced by 15 hm3. {1 ML should be replaced by 1 dam3} Likewise 150 Mha is a double multiplier error mhm2, and since the hectare is a cadastral unit designed for farms and towns, such a large area should be replaced by 1 500 000 km2 If you are still having trouble with how to use these - ask your self why 1 km2 ≠ 1 000 m2 |
3楼2015-09-25 08:54:31
yiranyiqiong
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4楼2015-09-25 08:56:40