题干
A poet and artist _____ coming to speak to us about Chinese literature and painting tomorrow afternoon.
A：i
B：are
C：will
D：ha
答案(点此获取答案解析）
A
A：i
B：are
C：will
D：ha
m，地球的轨道半径为
m，根据你所掌握的物理和天文知识，估算出火星与地球相邻两次距离最小的时间间隔为