7.太陽在春分點時,其座標(Dec.及RA)為何?
(A) Dec.=23.5°S,RA = 0° 
(B) Dec.=23.5°N,RA = 0° 
(C) Dec.=0°,RA = 180° 
(D) Dec.=0°,RA =0°

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統計： A(1), B(5), C(3), D(7), E(0) #2673954