He spent a lot of time on English. _______, he got the most points in the English test.
A:In fact
B:Otherwise
C:As a result
D:However
①a>b,c<d⇒a﹣c>b﹣d;
②a>b>0,c<d<0⇒ac>bd;
③a>b>0⇒ a3>b3 ;
④a>b>0⇒ 1a2>1b2 .
After the quarrel, I tried to fix the misunderstanding between us, but all my efforts seemed ______.
读“亚洲大陆沿30°N地形剖面示意图”(图1)、“亚洲大陆沿80°E地形剖面示意图”(图2),亚洲地势特点是( )
____自古以来就是中国的领土,因地壳运动与大陆分离。
50×140=____