What is the use of the books of Admiralty List of Lights and Fog Signals? Their use is to ().
A. Mention signal stations and ice,storm,traffic and port signals
B. Give the international numbers of lights
C. Give the correction of the lights and fog signals
D. Give the information on the lights and fog signal
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高速铁路硬横梁应呈水平状态,允许向上微拱,铰接硬横梁的挠度小于梁长的(),刚接硬横梁的挠度小于梁长的1/360。
A. 2%
B. 1.5%
C. 1%
D. 0.5%
BTS软件装载流程中,为加快软件装载速度,加载时BSC连续发送()个Load_Data_Segment(数据段装载)后,BTS发送Load_Data_Segment_Ack对最后一个数据段装载进行确认,BSC收到确认消息后,再继续发送。
A. 2
B. 4
C. 5
D. 6
压法的时间()
A. 比按法长
B. 比按法短
C. 与按法相同
D. 与按法无法比