A:经济繁荣
B:二世而亡
C:短暂而繁荣
D:崇尚节俭
8×4=____ 12×3=____ 80×4 =____ 120×3=____ 8×40=____
12×30=____ 80×40= ____ 120×30= ____ 800×40=____ 1200×30=____
It was a difficult time for the relatives of Missing MH370 passengers when they heard the bad news, but they didn't ________ hope.
一定质量的某理想气体,处在某一状态,经下列哪个过程后回到原来的温度( )