My uncle ______ the club in 2014. He ______the club for over 3 years.
A:joined; has been a member of
B:joined; has joined
C:has joined; has joined
D:has joined; has been in
如图是“追风者”磁悬浮列车悬浮原理的示意图.该列车通过磁体之间的相互作用,悬浮在轨道上方,以提高运行速度,这里的相互作用是指( )
It was ______ ten o'clock when I heard a loud noise.
下列人种与其主要分布地区连接正确的是( )