A:asked
B:told
C:agreed
D:promised
从春秋战国到明代,长城的修建经历了两千年多年。秦长城,东起辽东,西至( )
They were ____ ____ ____ ____a word when they met again 20 years later.
①当气体温度升高到t2=127℃时,活塞升高了多少?
②当气体温度升高到t3=357℃时,缸内气体的压强。
食物在口腔中充分咀嚼的重要意义是( )