鏁板璇曞嵎
2019
骞村崄鍫板競鍒濅腑姣曚笟鐢熷涓氳�冭瘯
鏁板璇曢
娉ㄦ剰浜嬮」锛?/p>
1
锛庢湰鍗峰叡鏈?/p>
4
椤碉紝鍏辨湁
25
灏忛锛屾弧鍒?/p>
120
鍒嗭紝鑰冭瘯鏃堕檺
120
鍒嗛挓锛?/p>
2
锛庣瓟棰樺墠锛岃�冪敓鍏堝皢鑷繁鐨勫鍚嶃�佸噯鑰冭瘉鍙峰～鍐欏湪璇曞嵎鍜岀瓟棰樺崱鎸囧畾鐨勪綅缃紝骞惰鐪?/p>
鏍稿鏉″舰鐮佷笂鐨勫噯鑰冭瘉鍙峰拰濮撳悕锛屽湪绛旈鍗¤瀹氱殑浣嶇疆璐村ソ鏉″舰鐮侊紟
3
锛庤�冪敓蹇呴』淇濇寔绛旈鍗＄殑鏁存磥锛岃�冭瘯缁撴潫鍚庯紝璇峰皢鏈瘯鍗峰拰绛旈鍗′竴骞朵笂浜わ紟
涓�銆侀�夋嫨棰橈細
锛堟湰棰樻湁
10
涓皬棰橈紝姣忓皬棰?/p>
3
鍒嗭紝鍏?/p>
30
鍒嗭級
涓嬮潰姣忓皬棰樼粰鍑虹殑鍥涗釜閫夐」涓紝鍙湁涓�涓槸姝ｇ‘鐨勶紝璇锋妸姝ｇ‘閫夐」鐨勫瓧姣嶅～娑傚湪绛旈
鍗′腑鐩稿簲鐨勬牸瀛愬唴锛?/p>
1
锛?/p>
2
-
鐨勫�肩瓑浜庯紙
锛?/p>
A
锛?/p>
2
B
锛?/p>
1
2
-
C
锛?/p>
1
2
D
锛庯紞
2
2
锛庡鍥撅紝
AB
鈭?/p>
CD
锛?/p>
CE
骞冲垎鈭?/p>
BCD
锛屸垹
DCE
=18掳
锛屽垯鈭?/p>
B
绛変簬锛?/p>
锛?/p>
A
锛?/p>
18掳
B
锛?/p>
36掳
C
锛?/p>
45
掳
D
锛?/p>
54掳
3
锛庝笅鍒楄繍绠椾腑锛屾纭殑鏄紙
锛?/p>
A
锛?/p>
2
3
5
a
a
a
+
=
B
锛?/p>
6
3
2
a
a
a
?
C
锛?/p>
4
2
6
(
)
a
a
=
D
锛?/p>
2
3
5
a
a
a
=
4
锛庣敤涓ゅ潡瀹屽叏鐩稿悓鐨勯暱鏂逛綋鎽嗘斁鎴愬鍥炬墍绀虹殑鍑犱綍浣擄紝杩欎釜鍑犱綍浣撶殑宸﹁鍥炬槸锛?/p>
锛?/p>
5
锛庡凡鐭ュ叧浜?/p>
x
鐨勪竴鍏冧簩娆℃柟绋?/p>
x
2
+2
x
锛?/p>
a
=0
鏈変袱涓浉绛夌殑瀹炴暟鏍癸紝鍒?/p>
a
鐨勫�兼槸锛?/p>
锛?/p>
A
锛?/p>
4
B
锛庯紞
4
C
锛?/p>
1
D
锛庯紞
1
6
锛庡鍥撅紝灏嗏柍
ABC
娌跨洿绾?/p>
DE
鎶樺彔鍚庯紝浣垮緱鐐?/p>
B
涓庣偣
A
閲嶅悎锛屽凡鐭?/p>
AC
=5cm
锛屸柍
ADC
鐨勫懆闀夸负
17cm
锛屽垯
BC
鐨勯暱涓猴紙
锛?/p>
A
锛?/p>
7cm
B
锛?/p>
10cm
C
锛?/p>
12cm
D
锛?/p>
22cm
7
锛?/p>
濡傚浘锛?/p>
姊舰
ABCD
涓紝
AD
鈭?/p>
BC
锛?/p>
AB=DC=
3
锛?/p>
AD=
5
锛?/p>
鈭?/p>
C=
60掳
锛?/p>
鍒欎笅搴?/p>
BC
鐨勯暱涓猴紙
锛?/p>
A
锛?/p>
8
B
锛?/p>
9
C
锛?/p>
10
D
锛?/p>
11
8
锛庡鍥撅紝鏄竴缁勬寜鐓ф煇绉嶈寰嬫憜鏀捐�屾垚鐨勫浘妗堬紝鍒欏浘
5
涓笁瑙掑舰鐨勪釜鏁版槸锛?/p>
锛?/p>
A
锛?/p>
B
锛?/p>
C
锛?/p>
D
锛?/p>
绗?/p>
6
棰?/p>
D
E
B
C
A
B
C
D
E
A
绗?/p>
2
棰?/p>
绗?/p>
7
棰?/p>
D
A
C
B
姝ｉ潰