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ִҵҩʦҩѧ֪ʶģ⣺ڷϵͳҩ1

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1ӹɣƼʱ A峿˯ǰһ B峿ٷ C˯ǰٷ Dͺҩ Eиҩ ȷ𰸡 A

𰸽 峿˯ǰһΪѣȡһ3ε÷ڲͺ1hãԼʳԸյӰ;ѡúߵƼƶD˯ǰá 2صò AԵʹ Bǰصķֽ CƳת˸ DֱƹϸĻ EСܶԸƺ׵ ȷ𰸡 B

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Եʹãתƣ¹ʹЧûƿڣǰصĺϳ;ͨϵͳֱӵʹ;Цڷй;øøʹӵͷţǿֹʹЧ 3ƾŮĹѡ AƤʼ B״ C D EƤʼ ȷ𰸡 D

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ִҵҩʦҩѧ֪ʶģ⣺ڷϵͳҩ1

ѡ1ӹɣƼʱA峿˯ǰһB峿ٷC˯ǰٷDͺҩEиҩȷ𰸡A𰸽峿˯ǰһΪѣȡһ3ε÷ڲͺ1hãԼʳԸյӰ;ѡúߵƼƶD˯ǰá2ص
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