(2/2)ҳ
һԭҶûлҲûӰõ˵ǡͬԡļӻתΪ߱ߵļӻû뵽߱߳Ȩ֮⣬Ȼô
ܵ塢ǿĸо
Ѫⷽûʲô仯
˵SDzDZڳѪţ
ҶҡҡͷҲûй㣬ʵϣǡ߱ߵļӻǡŭΡȨܣʵǺܴ
ڶȨ֮ħ֮ĹżǿĿⷽ棬
ҶɲǼ䣬Ȼ䡣
֮ϣڵۿɼٶȴ˷۶תۼڱƬա
صƲУĿ㴩쳹
¡
ȴ˲롣
ҶһͷƱ˲ɢأ·ղŵľֻһþ
㸲ǵرҪĵҲҪ١
ΪȨܵԵ𣿡
Ҷ˼
˵ʵûʲôοԡ
һǰѾ߽ˡ
Ȼûͻư˽ף˽ѾΪӽˣܲҪ£ٶͻơ
ڵֻǽȨܸǵ£ĵ;ţһëȻжٸо
ŭΡȨļֵڶľƿأһɺ绽꣬ƿ硣
ҶȨܵͬʱ۶ĽֵϣһλעĿŮͻȻפ㣻һɫ£ڴɫ֯ճŶԸеߡ
˫Ȱĺɫ˿УŲһ˫ϥĺɫ߸Ƥѥÿһɢ
һͷٵĺɫپµý۽żȻõ㽿Ρ
ɢһΣն˵ʣ·ƵƵĿ
˿̣ͷոոɢȥƣɫͫһ˿
ԲۣӦʲô
ֱӸǣôջˣ
촽ţȴһԼȫĴֿڡ
ĸ̬Ķ
Ҷǣôŵ𣿡
ӦòDzˣɣ
Ȼ֪ķȷʵô磬ҿɻʲôûأڸҸɣ
˵˵ţЩƵ̫Ѩ
ôĸǣа䶼DZʰ
ͷ˿ԼȣԼŻ̾˿
ˣȵ͵ɣȸս컨嵽ж.
û뵽ᷢϡ
ɯǸ̳صʥ˫ȣǾޱԼԪֻôѡ
뿪ʱһźڿ۾ԥǰԼĪʮ˾꣬ϴŽڴ飬Сؿڣ
Ǹ.Ů
ţ
üЩת
ʿˮȻǿǽȫһòDZˣǽŵĽ͵
ҵ˼ǣ۱жħĪŮ𣿻˵cosĪŮ
ȻôʿЩðҴûܰŮcosôֱӶ߳һ
ѬױĻ⣬Ǹdz
ǩĶ