Which of the listed conditions can be considered as the single greatest cause of accidents?（）<br>A:Speed<br>B:Excessive knowledge or skill<br>C:Human error<br>D:Excitement

Which of the listed conditions can be considered as the single greatest cause of accidents?（）
A:Speed
B:Excessive knowledge or skill
C:Human error
D:Excitement

出自：海船船员证

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