表示
In that country, the rich _____ richer, the poor poorer.
In that country, the rich \_\_\_\__ richer, the poor poorer.
The entire structure cost more than $2.5 million to build at the time.
The entire structure cost more than $2.5 million to build at the time.
某人向东行6千米，再向北行10千米，又向南行2千米．这个人所经过的路程等于____千米，发生的位移的大小是____．
某人向东行6千米，再向北行10千米，又向南行2千米．这个人所经过的路程等于\_\_\_\_千米，发生的位移的大小是\_\_\_\_．