A:It's my new toy car.
B:This is my new toy car.
C:Look at my new toy car.
要求:①文体不限,除诗歌外;②卷面整洁,不少于600字;③文中不得出现真实的地名、校名、人名。
— Can you see that man over there?
— That is my _______. ( )
如图表示人体胸廓容积的变化,到b点时,肺泡内,呼吸道,外界气压的关系是( )