图1适用于固液不加热制取气体,该类型的发生装置通常有三种:
Many charities raise money _______ children in poor areas.
一天中气温最高和最低值分别出现在( )
关于东北平原成为商品粮基地主要原因的叙述,不正确的是( )
I wasn't blaming anyone; I said errors like this could be avoided.