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۽㣬ǿѽDz㶼Ҫɢˣ
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һҲʣȱٵ⣬ⲿȶȹҪԱ
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һɽҲȽԾԣһһġ
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һijɳԸһ㣬ҲչIJԼ֡
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һ֪ϰǿλϷԱˡ
뵽Ѿ4λŮˣĽϰ׳
ˣôˣ칫һ˭СأIJϸ죿
СѧԺcosᣬԸ˵һ£ϾûӰ࣬ǺСһȥġ
СµȻ찮ˡ
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ǵͷΰѲҲ°ֻ찮˸Ϣ
ѧˣcosݳѣϰ忴
dzϣһֱڰ칫æ9㣬ſж
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Ҷ϶ܸо˵ԥ
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찮̵زϣߡ
Ǵϥǵķۺɫٷ˫ִŵijףɫϵJKƷһ˫˿Ͳ߸ѥ
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ϣֵ˶ʮӣ۲١
۽㣬ǿѽDz㶼Ҫɢˣ
ϣȻDZԹˣ٩һֻըӼѡ
ྩĽͨҲ֪ôҪҪϷ
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ҿըӼʵɣ뿪ʼıݡ
һϣһ䶺Цˡ
ôڣ˭أʼıݡ
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λĵŮˡ
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dzϣѸոպˬϷľ籾ۣʼ˺۴Ϸ
ⳡϷȻֱ۵ؿ˵ˮƽͱݷʽˣܲҵС
ʱԼȰá
ʫ飨ۣ
ѭ..ѭ.ҾDzͣѭ
ž٣ϣ
֮ǰ֢״أ.еġ
֮ȷʵ˵IJͬ
һһ㣬һһ㡣
֣ˬһ̨ǻȻ㣬߸Ӱɡ
ϣȻǸϲ۵ıݣⲿʫֻǸĻԵͨŮѧ
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Ҫĸʵһ㣬ַӳϷ
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ȰʦãûʦǿȻѽһһʦýʲô
ҾȰŲģſڿˣŮϲ
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أҲȥʹˡ
ͤҲȥ
˲ټĻҾʣۺͳϣˡ
ϣΨж̯̯֣˵
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ޣǰɡ
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СϰߣҶװ˸顣
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һɽϷʱ˳ϣλҲû¶ȵɫ
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˱Ҳݼ£Ϊʲôøһɽ
IJҲȶȣȵһ㡣
ϳɳأΪⲿӵ룬DzţǸоѹ
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һɽҲȽԾԣһһġ
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һijɳԸһ㣬ҲչIJԼ֡
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ڻвٹ˾ǰ˵
ˬӵ鹫˾һֱѡǵĽ
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һϣģ۹ٲ
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֪ϰΪѡǵ飬иϰߡ
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һ֪ϰǿλϷԱˡ
뵽Ѿ4λŮˣĽϰ׳
ˣôˣ칫һ˭СأIJϸ죿
СѧԺcosᣬԸ˵һ£ϾûӰ࣬ǺСһȥġ
СµȻ찮ˡ
뵽⣬ϣҲԼѧϰеиˡ
ҲܺСͬѧcosʲô⡣
ǵͷΰѲҲ°ֻ찮˸Ϣ
ѧˣcosݳѣϰ忴
dzϣһֱڰ칫æ9㣬ſж
ûһᣬš
Ҷ϶ܸо˵ԥ
ϣɾúЦ˵˾䣺
һʱϣ۾ϴ˾
찮cosŮսʿ
ǷɫϵССá
̫tmθˡ
ϣ˿ֻ뱻λŮ
찮ȥ裬ǿ˵
ȱˣȹϰ忴
찮̵زϣߡ
Ǵϥǵķۺɫٷ˫ִŵijףɫϵJKƷһ˫˿Ͳ߸ѥ
ϣĿˮɵض˶٣佱
ҲСԼ·ÿ
һ߿佱أһ߲ʵĽ˹
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ϣʱһֲֻĹϡ
˽¤Ƥʤ𤵤ޤ
찮ܵϰֵֻĻȣɵض϶˵һ
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