24÷23+24，
=24×32+24，
=60（棵）；
答：校园里有杨树和柳树共60棵．
止血带止血时，每（）分钟松解止血带一次，以防出现肢体坏死。
A、10
B、15
C、30
D、60
How big is the house he moved in
A．As big as the old one.
B．Twice as big as mine.
C．As big as mine.
D．Twice bigger than mine.
