在视线中心附近的范围内是一个眩光区,视线离光源越近,眩光越严重,这个视线中心角度是
A.30°
B.50°
C.60°
D.70°
正确答案是A
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Suburbia (郊区) As the cities became more crowded and as the means of transportation improved, middle-class residents (居民)of the city began to move out. In the suburbs they could find ____41___ (safe), more attracti