1ó?ú′?×±×??÷??μ?ì?μ?ê?′?D??ü·á?ú£???é??Tò?μ?£?á?è???μ?ê¢ì???à???ó??·μ???′ú·??a?£??êμ2?ò??¨??óD·á?úo?×ì′?2??ü?Yò??a?ùμ?′?×±£???êμ??í¨è?ò2?éò??a?ùμ?1ó???£????èy???÷D?£??Yò?í¨1y??D?′ò?ìμ?1ó?ú′?×±£?3é1|±?éíD??DD???£?á?è?2????Tì??£
′?×±??óDó??óá|?ò???èy???÷D?×±èY?Yò??°ó??ó?±′?×±
1. ′?í3μ???1a′??à?üóD??D?′?2??ê?D£?′óoì?ò×?oì??ê?′?×±?-μ?é??μ?£
2. ×¢òa?ùóD?ˉ×±2??è??ó?????μ?±ê?òD??¢??DD£?ì??ú??ò?μà′???£???2?ê??±?óó?ê???í??¨?£
3. ?-′???ê±£??éó?′???±ê°?′?μ???àaêêμ±??íaà?ò?μ?£?′?×±?ú??′|???¢??ía?ì?£