If you want to study the nature of the universe, first of all, you must be clear about its .
A. traditions
B. consequences
C. signs
D. origins
网友回答
A. traditions
B. consequences
C. signs
(答案→)D. origins
解析:考查名词辨析。A传统;B结果;C迹象;D起源;句意:如果你想了解宇宙的特征。首先你必须对宇宙的起源很清楚。根据句意说明D正确。