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下列关于甲烷(CH4)说法中,正确的是(  )

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±0.20%CH4  ±0.10%CH4  ±0.01%CH4  ±0.05%CH4  
0.01%CH4  0.20%CH4  0.30%CH4  0.05%CH4  
≥1.0%CH4;≥1.0%CH44;<1.0%CH4  ≥1.5%CH4;≥1.5%CH44;<1.0%CH4  ≥1.0%CH4;≥1.5%CH44;<1.0%CH4  ≥1.5%CH4;≥1.0%CH44;<1.0%CH4  
±0.20%CH4  ±0.10%CH4  真值的±10%CH4  真值的±20%CH4  
≥1.0%CH4;≥1.0%CH4;  ≥1.5%CH4;≥1.5%CH4;  ≥1.0%CH4;≥1.5%CH4;  ≥1.5%CH4;≥1.0%CH4;  
2.00%~3.00%CH4  3.00%~5.00%CH4  1.00%~2.00%CH4  2.00%~4.00%CH4  
CH3CI  CH2CI2  CHCI3  CCI4  CCI3  
CH3Cl  CH2Cl2  CHCl3  CCl4  CCl3  
±0.1%CH4  ±0.2%CH4  0.1%CH4  0.2%CH4  
0.04%CH4,0.4%CH4  0.1%CH4,0.4%CH4  0.02%CH4,0.4%CH4  0.1%CH4,0.5%CH4  
报警浓度≥1.0%CH4  断电浓度≥1.0%CH4  断电浓度≥1.5%CH4  复电浓度<1.0%CH4  
0.1%CH4,0.1%CH4  0.1%CH4,0.4%CH4  0.01%CH4,0.1%CH4  0.01%CH4,0.01%CH4  
0.10%~4.00%CH4  0.20%~4.00%CH4  0.00~4.00%CH4  0.00~5.00%CH4  
≥0.5%CH4,≥0.5%CH4,<0.5%CH4  ≥1.5%CH4,≥1.5%CH4,<1.5%CH4  ≥1.0%CH4,≥1.0%CH4,<1.0%CH4  

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