鏁板绮惧搧澶嶄範璧勬枡
锛?/p>
2013
鈥?/p>
閬傚畞锛夊鍥撅紝鍦?/p>
鈻?/p>
ABC
涓紝鈭?/p>
C=90
掳
锛屸垹
B=30
掳
锛屼互
A
涓哄渾蹇冿紝浠绘剰闀夸负鍗婂緞鐢诲姬
鍒嗗埆浜?/p>
AB
銆?/p>
AC
浜庣偣
M
鍜?/p>
N
锛屽啀鍒嗗埆浠?/p>
M
銆?/p>
N
涓哄渾蹇冿紝澶т簬
MN
鐨勯暱涓哄崐寰勭敾寮э紝涓ゅ姬浜?/p>
浜庣偣
P
锛岃繛缁?/p>
AP
骞跺欢闀夸氦
BC
浜庣偣
D
锛屽垯涓嬪垪璇存硶涓纭殑涓暟鏄紙
锛?/p>
鈶?/p>
AD
鏄垹
BAC
鐨勫钩鍒嗙嚎锛?/p>
鈶?/p>
鈭?/p>
ADC=60
掳
锛?/p>
鈶?/p>
鐐?/p>
D
鍦?/p>
AB
鐨勪腑鍨傜嚎涓婏紱
鈶?/p>
S
鈻?/p>
DAC
锛?/p>
S
鈻?/p>
ABC
=1
锛?/p>
3
锛?/p>
A
锛?/p>
1
B
锛?/p>
2
C
锛?/p>
3
D
锛?/p>
4
鑰冪偣
锛?/p>
瑙?/p>
骞冲垎绾跨殑鎬ц川锛涚嚎娈靛瀭鐩村钩鍒嗙嚎鐨勬�ц川锛涗綔鍥?/p>
鈥?/p>
鍩烘湰浣滃浘锛?/p>
鍒嗘瀽锛?/p>
鈶?/p>
鏍规嵁浣滃浘鐨勮繃绋嬪彲浠ュ垽瀹?/p>
AD
鏄垹
BAC
鐨勮骞冲垎绾匡紱
鈶?/p>
鍒╃敤瑙掑钩鍒嗙嚎鐨勫畾涔夊彲浠ユ帹鐭モ垹
CAD=30
掳
锛屽垯鐢辩洿瑙掍笁瑙掑舰鐨勬�ц川鏉ユ眰鈭?/p>
ADC
鐨?/p>
搴︽暟锛?/p>
鈶?/p>
鍒╃敤绛夎瀵圭瓑杈瑰彲浠ヨ瘉寰?/p>
鈻?/p>
ADB
鐨勭瓑鑵颁笁瑙掑舰锛岀敱绛夎叞涓夎褰㈢殑
鈥?/p>
涓夊悎涓�
鈥?/p>
鐨勬�ц川
鍙互璇佹槑鐐?/p>
D
鍦?/p>
AB
鐨勪腑鍨傜嚎涓婏紱
鈶?/p>
鍒╃敤
30
搴﹁鎵�瀵圭殑鐩磋杈规槸鏂滆竟鐨勪竴鍗娿�佷笁瑙掑舰鐨勯潰绉绠楀叕寮忔潵姹備袱涓笁瑙掑舰
鐨勯潰绉箣姣旓紟
瑙ｇ瓟锛?/p>
瑙?/p>
锛?/p>
鈶?/p>
鏍规嵁浣滃浘鐨勮繃绋嬪彲鐭ワ紝
AD
鏄垹
BAC
鐨勫钩鍒嗙嚎锛?/p>
鏁?/p>
鈶?/p>
姝ｇ‘锛?/p>
鈶?/p>
濡傚浘锛屸埖鍦?/p>
鈻?/p>
ABC
涓紝鈭?/p>
C=90
掳
锛屸垹
B=30
掳
锛?/p>
鈭粹垹
CAB=60
掳
锛?/p>
鍙堚埖
AD
鏄垹
BAC
鐨勫钩鍒嗙嚎锛?/p>
鈭粹垹
1=
鈭?/p>
2=
鈭?/p>
CAB=30
掳
锛?/p>
鈭粹垹
3=90
掳
锕ｂ垹
2=60
掳
锛屽嵆鈭?/p>
ADC=60
掳
锛?/p>
鏁?/p>
鈶?/p>
姝ｇ‘锛?/p>
鈶?/p>
鈭碘垹
1=
鈭?/p>
B=30
掳
锛?/p>
鈭?/p>
AD=BD
锛?/p>
鈭寸偣
D
鍦?/p>
AB
鐨勪腑鍨傜嚎涓婏紟
鏁?/p>
鈶?/p>
姝ｇ‘锛?/p>
鈶?/p>
鈭靛鍥撅紝鍦ㄧ洿瑙?/p>
鈻?/p>
ACD
涓紝鈭?/p>
2=30
掳
锛?/p>
鈭?/p>
CD=AD
锛?/p>
鈭?/p>
BC=CD+BD=AD+AD=AD
锛?/p>
S
鈻?/p>
DAC
=AC
鈥?/p>
CD=AC
鈥?/p>
AD
锛?/p>
鈭?/p>
S
鈻?/p>
ABC
=AC
鈥?/p>
BC=AC
鈥?/p>
AD=AC
鈥?/p>
AD
锛?/p>
鈭?/p>
S
鈻?/p>
DAC
锛?/p>
S
鈻?/p>
ABC
=AC
鈥?/p>
AD
锛?/p>
AC
鈥?/p>
AD=1
锛?/p>
3
锛?/p>