A.1/5 B.1/4 C.1/3 D.1/2
A.15% B.20% C.25% D.30%
A.冬至日日照≥1小時(shí) B.冬至日日照≥2小時(shí) C.大寒日日照≥2小時(shí) D.大寒日日照≥3小時(shí)