人和类人猿有共同祖先。 是人区别于猿的重要特征。
直立行走
人类祖先的直立行走,是从古猿进化到人具有决定意义的一步。
-I’ll come to see your performance at 9:00 tomorrow morning.
-I’m sorry, by then my performance ______ and I _______ reporters in the meeting room.
A.will end; will meet
B.will have ended; will be meeting
C.will be ended; am going to meet
D.is to end; will be meeting
地球上四大洋中,面积第二大的是( )
A.太平洋
B.印度洋
C.大西洋
D.北冰洋