十个十个地数,10个十是____.
一百一百地数,10个一百是____.
It seemed difficult ____ (get) inside because the line was so long.
研究液体压强的实验分步进行,如图所示是实验中的某一步.若实验中液体的密度不变,从实验中的这一步可得出的结论是( )