单选题A low HDOP (Horizontal Dilution of Precision) number such as 2 indicates a （）.Apoor fixBgood fixCpoor signal qualityDgood signal quality
单选题
A low HDOP (Horizontal Dilution of Precision) number such as 2 indicates a （）.
A
poor fix
B
good fix
C
poor signal quality
D
good signal quality
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名词解释题稀释效应 dilution effect