《铁路技术管理规程》（普速铁路部分）听觉信号，音响间隔为（）s。
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手术执刀的方法常用的有5种，即（），（），（），全握式，反挑式。
C型钩是（）的，不吊钢卷时和吊一定宽度钢卷时都能使钩爪保持平衡。
A. 条块式
B. 压块式
C. 滑块式
D. 移动式
According to SINOTIME Charter In the event of loss of time due to（），hire will not cease.
A. detention of or interference with the Vessel by any authorities in consequence of legal action against，or breach of regulations by the Owners，Master，Officers or Crew
B. stoppages resulting from any breach of this Charter by the Owners
C. deviation，putting back or putting into any port other than that to which she is bound under the instructions of Charterers for any reason or for any purpose
D. reasonable deviatio
到达少收电报首次应在2小时以内拍发，第二次应在（）小时以内拍发。
A. 2
B. 1
C. 4
D. 8
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