A:150°
B:60°
C:30°
D:15°
板块构造学说认为( )
It was only after he had read the papers ________ Mr. Gross realized the task before him was extremely difficult to complete.
周恩来对某位美国总统说:“你的手伸过世界最辽阔的海洋来和我握手―25年没有交往了呵。”该总统是( )