题目内容（请给出正确答案）

[主观题]

You are testing a tank that contained gasoline by using a combustible gas indicator．Under

testing，the tank sample caused the needle to move rapidly to 100 on the dial then fall to zero．What is the concentration of flammable gas ________．

A.Less than the flammable range

B.Within the flammable range

C.Over the flammable range

D.The explosimeter is defective and giving a false reading

提问人：网友microtse123 发布时间：2022-01-06

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