我国最长的河流长江全长约为6300千米,用科学记数法表示为( )
A:63×102千米
B:6.3×103千米
C:6.3×104千米
D:6.3×106千米
They had a difficult time _______ in the village at first, but soon they got over it.
下列关于亚洲人口和文化的叙述,正确的是 ( )