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含量水平

  • 网络ppm

含量水平含量水平
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含量水平

ppm

...量 作物 栽培条件 采样部位 采样时期 作物硝态氮含量水平（ppm） 低 玉米 田间 田间 田间 田间 叶鞘下半段 叶鞘下半段 果穗 …

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The uniform 20 percent oxygen level it has found turns out to be " fortuitous " as one scientist put it.
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Patients can be monitored by using standard screening tools to assess pain, and urine tests to detect medication levels.
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They found how it works -- by raising levels of a compound called tetrahydropapaveroline or THP.
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Compared with sediments from other areas, OCPs concentrations in sediments were much higher in the studied area.
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The content of ascorbic acid increases in parallel to the rise in the activity level ofperoxidase.
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But sometimes the right answer is the simplest: it turns out CO2 levels were not that high after all.
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Levels of free testosterone found in the 300-microgram-dose group were close to those usually seen in women ages 18 to 24 years.
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But virus content level in 1b type much higher than 2a type. (4) HCV genotypes was not correlated with malignant tumor of liver.
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Mothers who had low iron status also had babies with low iron levels.
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From Fig. 4 it can be seen that skeletal copper containing this level of Co had negligible activity for the water gas shift reaction.
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The researchers are working to construct a record of carbon dioxide levels in the atmosphere over the last 100, 000 years.
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