鏁板璇曞嵎
锛?/p>
2019
鈥㈡箻瑗垮窞锛?/p>
濡傚浘锛?/p>
Rt鈻矨BC
涓紝
鈭燙=90掳锛?/p>
AD
骞冲垎鈭燙AB锛?/p>
DE鈯B
浜?/p>
E
锛?/p>
鑻?/p>
AC=6
锛?/p>
BC=8
锛?/p>
CD=3
锛?/p>
锛?/p>
1
锛夋眰
DE
鐨勯暱锛?/p>
锛?/p>
2
锛夋眰鈻矨DB
鐨勯潰绉紟
鑰冪偣
锛?/p>
瑙?/p>
骞冲垎绾跨殑鎬ц川锛涘嬀鑲″畾鐞?/p>
鍒嗘瀽锛?/p>
锛?/p>
1
锛夋牴鎹骞冲垎绾挎�ц川寰楀嚭
CD=DE
锛屼唬鍏ユ眰鍑哄嵆鍙紱
锛?/p>
2
锛夊埄鐢ㄥ嬀鑲″畾鐞嗘眰鍑?/p>
AB
鐨勯暱锛岀劧鍚庤绠椻柍ADB
鐨勯潰绉紟
瑙ｇ瓟锛?/p>
瑙?/p>
锛?/p>
锛?/p>
1
锛夆埖AD
骞冲垎鈭燙AB锛孌E鈯B锛屸垹C=90掳锛?/p>
鈭碈D=DE锛?/p>
鈭礐D=3锛?/p>
鈭碊E=3锛?/p>
锛?/p>
2
锛夊湪
Rt鈻矨BC
涓紝鐢卞嬀鑲″畾鐞嗗緱锛?/p>
AB=
=
=10
锛?/p>
鈭粹柍A
DB
鐨勯潰绉负
S鈻矨DB=
AB鈥E=
脳10脳3=15锛?/p>
鐐硅瘎锛?/p>
鏈?/p>
棰樿�冩煡浜嗚骞冲垎绾挎�ц川鍜屽嬀鑲″畾鐞嗙殑杩愮敤锛?/p>
娉ㄦ剰锛氳骞冲垎绾夸笂鐨勭偣鍒拌涓よ竟鐨勮窛绂?
鐩哥瓑锛?/p>
锛?/p>
2019
鈥㈡牚娲诧級
宸茬煡鍥涜竟褰?/p>
ABCD
鏄竟闀夸负
2
鐨勮彵褰紝
鈭燘AD=60掳锛?/p>
瀵硅绾?/p>
AC
涓?/p>
BD
浜や簬鐐?/p>
O
锛?/p>
杩囩偣
O
鐨勭洿绾?/p>
EF
浜?/p>
AD
浜庣偣
E
锛屼氦
BC
浜庣偣
F
锛?/p>
锛?/p>
1
锛夋眰璇侊細鈻矨OE鈮屸柍COF锛?/p>
锛?/p>
2
锛夎嫢鈭燛OD=30掳锛屾眰
CE
鐨勯暱锛?/p>