A、A.≥1.0%CH4;≥1.0%CH44;<1.0%CH4
B、B.≥1.5%CH4;≥1.5%CH44;<1.0%CH4
C、C.≥1.0%CH4;≥1.5%CH44;<1.0%CH4
D、D.≥1.5%CH4;≥1.0%CH44;<1.0%CH4
A、A.≥1.0%CH4;≥1.0%CH44;<1.0%CH4
B、B.≥1.5%CH4;≥1.5%CH44;<1.0%CH4
C、C.≥1.0%CH4;≥1.5%CH44;<1.0%CH4
D、D.≥1.5%CH4;≥1.0%CH44;<1.0%CH4