【填空题】
65. CRH380A 统型动车组的T车利用 安装在各车辆轴端的速度发电机 所发出的信号，每___毫秒算 出各轴的速度，检测滑行状态。
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20
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【单选题】
事故调查组在事故发生后应当及时通知相关单位和人员；一般B类事故以上、重大以下的事故（不含相撞的事故）发生后，应当在___内通知相关单位，接受调查。(1.0分)
A. 2h
B. 8h
C. 12h
D. 24h
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