ިŭ⣬ͷڴĽ͡
ҲգⶼҪ뻺һЩŰިͼûü۵ŮӣͼҪҲ£ŮӣIJֶɣ
ި͵һ۾Ҫѿڶ֪ģ
ͼԭһֽεӰֻһŮӡ
ûüۣûȻˣֻһ
ިǵãʱʮ꣬ڰ̯һֽͷȴֻһССӰԭΪһŻ˵ֽ˭븸һض˵סһҪúղֽǧܻܶ٣Ȼһ죬ԼĻʮˣͰֽȻĻȥ¼һ
Ϊۼ֤ѻɵһ̣ԿިԼʮʱ䣬ʱԼģ˭Ͼ£ިԼûãȴòӲͷƤҵһ¼ҵĻᡣǵãԼֽ̯һ죬Ƕʱ֡īĥˡһĥһֻռֽһǸŮӣިͻȻãƺĹ¼ţԽµʱԽůЩһˮУȻŮӣҲǼįDZѩڣʱһĨɫͻȻ䣬б桪
һҶ۴λȥվһŮӣվڴͷĿԶڴԶ˭ڵֻǿֵʱһĴˮת֮ļˮˮɽɫһһ£̣Ҳв͵ֵķḻĪ˵ưס̡ɽࡢ졢¡зˮ˽ĵĿŮӵȹ紵ЩƮȻɵķˡ
Ϊûüۣ˭ⶼһɫˡ
ިػͼֻһ¼ܾпԸáѧ֮ˣȻ÷ӳѩĴ˵Ӳ뵽Ҫô˻øףԼ⸱ͼйء˵ȱü۵Ůйء
ġġ÷ӳѩƣЩIJͬеǷƷн÷յüۣͼŮϣҷ˿;Ļƽ֯һ÷
̫˾ĪˣިĽһͷǡĪ˵¸Ǹһſڿӵʵʵ֪࣬ͼǰި֮Ͷ棬븮ټĸ룬ǧúñǷܻܶ٣١ȻҲܲƶûɫմި˲ӯ״һʱסƵģҲڡ
ԶοϦ 3(1/2),һҳĶ