兼做回风井的装有带式输送机的井筒甲烷传感器报警浓度、断电浓度、复电浓度分别是()
A.≥0.5%,≥0.5%,<0.5%
B.≥0.5%,≥0.7%,<0.7%
C.≥1.5%,≥1.5%,<1.5%
D.≥1.5%,≥2.0%,<1.5%
A.≥0.5%,≥0.5%,<0.5%
B.≥0.5%,≥0.7%,<0.7%
C.≥1.5%,≥1.5%,<1.5%
D.≥1.5%,≥2.0%,<1.5%
第2题
A.≥0.5%,≥0.5%,<0.5%
B.≥1.0%,≥1.0%,<1.0%
C.≥1.5%,≥1.5%,<1.5%
D.≥1.5%,≥2.0%,<1.5%
第4题
A.A.≥0.5%,≥0.5%,<0.5%
B.B.≥1.5%,≥1.5%,<1.5%
C.C.≥1.0%,≥1.0%,<1.0%
D.D.≥1.5%,≥2.0%,<1.5%
第5题
A.A.≥1.0%,≥1.5%,<1.0%
B.B.≥1.5%,≥1.5%,<1.5%
C.C.≥0.5%,≥1.0%,<0.5%
D.D.≥1.5%,≥2.0%,<1.5%
第6题
A.A.≥1.0%,≥1.5%,<1.0%
B.B.≥1.5%,≥1.5%,<1.5%
C.C.≥0.5%,≥1.0%,<0.5%
D.D.≥1.5%,≥2.0%,<1.5%
第7题
A.A.≥1.0%;≥1.0%
B.B.≥1.0%;≥1.5%
C.C.≥1.5%;≥1.5%
D.D.≥1.5%;≥3.0%
第8题
A.≥1.0%,≥1.5%,<1.0%
B.≥1.5%,≥1.5%,<1.0%
C.≥0.5%,≥1.0%,<0.5%
D.≥1.5%,≥2.0%,<1.5%
第10题
A.≥1.0%,≥1.5%,<1.0%
B.≥1.5%,≥1.5%,<1.5%
C.≥2.5%,≥2.5%,<2.5%
D.≥1.5%,≥2.0%,<1.5%
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