无线网络规划流程中,包含a.需求分析,b.仿真验证,c.拓补设计,d.传播模型校正,e.输出报告等几个主要步骤,这些步骤的正确顺序是()
A. abcde
B. acbde
C. acdbe
D. dbcae
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下列汉字属一素一字异音可称做异读字的是()
A. 血
B. 白
C. 调
D. 氧
According to Regulations, a power driven auxiliary steering gear for a vessel capable of a 12 knot service speed, must be able to meet the rudder movement requirements at which of the minimum vessel speeds listed below?()
A. 6 knots
B. 7 knots
C. 9 knots
D. 12 knot
小电流接地系统在寻找单相接地故障时,有哪些注意事项?