2012
骞村箍宸炲競鍒濅腑姣曚笟鐢熷涓氳�冭瘯
鏁?/p>
瀛?/p>
绗竴閮ㄥ垎
閫夋嫨棰?/p>
锛堝叡
30
鍒嗭級
涓�銆侀�夋嫨棰?/p>
锛堟湰澶ч鍏?/p>
10
灏忛锛屾瘡灏忛
3
鍒嗭紝婊″垎
30
鍒嗐�傚湪姣忓皬棰樼粰鍑虹殑
4
涓�夐」涓彧
鏈変竴椤规槸绗﹀悎棰樼洰瑕佹眰鐨勶級
1
锛庡疄鏁?/p>
3
鐨勫�掓暟鏄紙
锛?/p>
銆?/p>
锛?/p>
A
锛?/p>
銆?/p>
閿欒锛佹湭鎵惧埌寮曠敤婧愩�?/p>
锛?/p>
B
锛?/p>
銆?/p>
閿欒锛佹湭鎵惧埌寮曠敤婧愩�?/p>
锛?/p>
C
锛?/p>
銆?/p>
閿欒锛?/p>
鏈壘
鍒板紩鐢ㄦ簮銆?/p>
锛?/p>
D
锛?/p>
銆?/p>
閿欒锛佹湭鎵惧埌寮曠敤婧愩�?/p>
2
锛庡皢浜屾鍑芥暟
閿欒锛佹湭鎵惧埌寮曠敤婧愩�?/p>
鐨勫浘璞″悜涓嬪钩绉?/p>
1
涓崟浣嶏紝鍒欏钩绉诲悗鐨勪簩娆″嚱鏁扮殑瑙?/p>
鏋愬紡涓猴紙
锛?/p>
銆?/p>
锛?/p>
A
锛?/p>
銆?/p>
閿欒锛佹湭鎵惧埌寮曠敤婧愩�?/p>
锛?/p>
B
锛?/p>
銆?/p>
閿欒锛佹湭鎵惧埌寮曠敤婧愩�?/p>
锛?/p>
C
锛?/p>
銆?/p>
閿欒锛?/p>
鏈壘
鍒板紩鐢ㄦ簮銆?/p>
锛?/p>
D
锛?/p>
銆?/p>
閿欒锛佹湭鎵惧埌寮曠敤婧愩�?/p>
3
锛庝竴涓嚑浣曚綋鐨勪笁瑙嗗浘濡傚浘
1
鎵�绀猴紝鍒欒繖涓嚑浣曚綋鏄紙
锛?/p>
銆?/p>
锛?/p>
A
锛?/p>
銆佸洓妫遍敟
锛?/p>
B
锛?/p>
銆?/p>
鍥涙１鏌?/p>
锛?/p>
C
锛?/p>
銆佷笁妫遍敟
锛?/p>
D
锛?/p>
銆佷笁妫辨煴
4
锛庝笅闈㈢殑璁＄畻姝ｇ‘鐨勬槸
( )
銆?/p>
锛?/p>
A
锛?/p>
銆?/p>
閿欒锛佹湭鎵惧埌寮曠敤婧愩�?/p>
锛?/p>
B
锛?/p>
銆?/p>
閿欒锛佹湭鎵惧埌寮曠敤婧愩�?/p>
锛?/p>
C
锛?/p>
銆?/p>
閿欒锛?/p>
鏈壘鍒板紩
鐢ㄦ簮銆?/p>
锛?/p>
D
锛?/p>
銆?/p>
閿欒锛佹湭鎵惧埌寮曠敤婧愩�?/p>
5
锛庡鍥?/p>
2
锛屽湪绛夎叞姊舰
ABCD
涓紝
BC
鈭?/p>
AD
,
AD
=5,
DC
=4,
DE
鈭?/p>
AB
浜?/p>
BC
浜庣偣
E
锛屼笖
EC
=3
锛屽垯
姊舰
ABCD
鐨勫懆闀挎槸锛?/p>
锛?/p>
锛?/p>
A
锛?/p>
銆?/p>
26
锛?/p>
B
锛?/p>
銆?/p>
25
锛?/p>
C
锛?/p>
銆?/p>
21
锛?/p>
D
锛?/p>
銆?/p>
20
6
锛?/p>
.
宸茬煡
閿欒锛佹湭鎵惧埌寮曠敤婧愩�?/p>
鍒?/p>
閿欒锛佹湭鎵惧埌寮曠敤婧愩�?/p>
(
)
銆?/p>
锛?/p>
A
锛?/p>
銆?/p>
-8
锛?/p>
B
锛?/p>
銆?/p>
-6
锛?/p>
C
锛?/p>
銆?/p>
6
锛?/p>
D
锛?/p>
銆?/p>
8
7.
閿欒锛佹湭鎵惧埌寮曠敤婧愩�?/p>
涓紝鈭?/p>
C=90
0
锛?/p>
AC
=9,
BC
=12,
鍒欑偣
C
鍒?/p>
AB
鐨勮窛绂绘槸
(
)
銆?/p>
锛?/p>
A
锛?/p>
銆?/p>
閿欒锛佹湭鎵惧埌寮曠敤婧愩�?/p>
锛?/p>
B
锛?/p>
銆?/p>
閿欒锛佹湭鎵惧埌寮曠敤婧愩�?/p>
锛?/p>
C
锛?/p>
銆?/p>
閿欒锛?/p>
鏈壘鍒板紩鐢ㄦ簮銆?/p>
锛?/p>
D
锛?/p>
銆?/p>
閿欒锛佹湭鎵惧埌寮曠敤婧愩�?/p>
8.
宸茬煡
閿欒锛佹湭鎵惧埌寮曠敤婧愩�?/p>
>
b
.
鑻?/p>
c
鏄换鎰忓疄鏁帮紝鍒欎笅鍒椾笉绛夊紡涓�绘槸
鎴愮珛鐨勬槸锛?/p>
锛?/p>
銆?/p>
锛?/p>
A
锛?/p>
銆?/p>
a+c
<
b+c
锛?/p>
B
锛?/p>
銆?/p>
a-c
>
b-c
锛?/p>
C
锛?/p>
銆?/p>
ac
<bc
锛?/p>
D
锛?/p>
銆?/p>
ac
>bc