校园内有两棵树，相距12m，一棵树高13m，另一棵树高8m，一只小鸟从一棵树的顶端飞到另一棵树的顶端，小鸟至少要飞（ ）m．
13
对机动车进行安全检查是为了＿。
A.收费
B.督促车主保持良好车况
C.减少环境污染
D.减少事故后的伤亡人数
Of these two basketball teams, the former comes from the US; the comes from England.
A．late
B．later
C．latter
D．lately
