单选题For H2S detection,sensitized tapes indicate H2S presence by means of discoloration of an exposed spot on the tape. The shade of the color on the spot depends upon the concentration of H2S and().Aair temperature at the time of the exposureBair pressure at the time of the exposureChumidity at the time of exposureDduration of the exposure
单选题
For H2S detection,sensitized tapes indicate H2S presence by means of discoloration of an exposed spot on the tape. The shade of the color on the spot depends upon the concentration of H2S and().
A
air temperature at the time of the exposure
B
air pressure at the time of the exposure
C
humidity at the time of exposure
D
duration of the exposure
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