問題詳情
34. What is the key factor of the Sun that directly determines our human (and many
animals) adaptation and sensitivity to its visible light?
(A) its mass
(B) its radius
(C) its total radiation
(D) its surface temperature
(E) geomagnetic storms and solar flares
參考答案
答案：D
統計：A:0,B:0,C:0,D:0,E:0
難度：計算中