单选题A spark arrestor（）.Akeeps sparks from falling into an open tankBsecures covers on ullage openingsCprevents sparks from getting out of an engine's exhaust systemDgrounds static electricity
单选题
A spark arrestor（）.
A
keeps sparks from falling into an open tank
B
secures covers on ullage openings
C
prevents sparks from getting out of an engine's exhaust system
D
grounds static electricity
参考解析
解析：
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