George _________ too far. His coffee is still warm.
A:must have gone
B:might have gone
C:can't have gone
D:needn't have gone
将下列少数民族与其对应传统节日搭配:
A回族____ ①雪顿节
B傣族____ ②那达慕节
C藏族____ ③泼水节
D蒙古族____ ④丰收节
E高山族____ ⑤开斋节
已知:如图,正方形网格中,∠AOB如图放置,则cos∠AOB的值为( )