462+859=____
2017年4月,我国首艘货运飞船 在海南文昌发射取得圆满成功,标志着我国即将开启空间站时代。( )
南亚有三大地形区,其地势特征是( )
— Could we practice playing the guitar in the hall, Sir ? —No , ___________ you have the principal's (校长) note.