单项选择题
（）is not a search pattern.
A.Williamson Turn
B.Parallel
C.Sector
D.zig-zag maneuver
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相关考题
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单项选择题
（） is not a search manual.
A.MERSAR
B.IMOSAR
C.ICAO SAR
D.SOSREP -
单项选择题
（）is a/an aircraft used in SAR.
A.MRCC
B.SOSREP
C.MCA
D.3A -
单项选择题
Which statement about firefighting foam is TRUE?（）
A.Foam conducts electricity
B.To be most effective，foam should be directed at the base of the fire
C.Foam is most effective on burning liquids which are flowing
D.Foam can ONLY be used to extinguish class A fires
