��ע��_��̷��_��ô��

��Ӥ��е�һ��ת�ۡ��ע����Ҫ��̣�һ��ڴ��á��Լ��̺��λ��Ǻܶ��ڱ��ʱ��⡣��ڼ��ô�죬�ּ��OR��ѿ��?��β��ܱ��Ǽ��̺��?��̺��λ��?��ױ��С��Ϊ��һһ��

��ע��

�׻�˵��ˮ��ˮ��ĸ�׵��ˮ��ĸ��Ӥ��е�ʳƷ��ר��ᳫĸ��Ӧ��ι��1��ꡣ��̶��ĸ��ι��ı��˵��һ��Ѷ�ʹ��Ĺ��̡�ר��ѣ��Ӷ��һ��Ҫ��ģ��Ȼ��̷��ȽϺá�[��ϸ��]

��ձ��Ķ��ʱ��	��Ȼ��̵��
	��̺��ʲô	��

��ι��10��ºͿ��Կ��Ƕ��̡��ʱ��Ҳ��Ҫ��Ի��̵��⡣��ô��̺��λ��أ��ѡ��Ȼ��̣��Լ��ȽϺá�ʵ��ǵ��Ҳ��ѡ��Ի��ҩ��ǽ��龡��ٳԡ�[��ϸ��]

��ʳƪ��߲�	��ʳƪ:��̻��
	��ɽ��ѿˮ��	��ѡ��ѿ