娴峰崡鐪佷竾瀹佸競
2019-2019
瀛﹀勾搴︾涓�瀛︽湡涔濆勾
绾ф暟瀛︽湀鑰冭瘯棰樹竴
鐝骇锛?/p>
濮撳悕锛?/p>
搴у彿锛?/p>
鎴愮哗锛?/p>
涓�銆侀�夋嫨棰橈紙姣忓皬棰?/p>
3
鍒嗭紝鍏?/p>
42
鍒嗭級
1
锛庝笅鍒楀浘褰腑锛屾槸涓績瀵圭О鍥惧舰鐨勬槸锛?/p>
锛?/p>
A
锛?/p>
B
锛?/p>
C
锛?/p>
D
锛?/p>
2.
涓�鍏冧簩娆℃柟绋?/p>
0
1
x
x
2
2
飥?/p>
飥?/p>
飥?/p>
鐨勪竴娆￠」绯绘暟鍜屽父鏁伴」渚濇鏄?/p>
( )
A
銆?/p>
-1
鍜?/p>
1 B
銆?/p>
1
鍜?/p>
1 C
銆?/p>
2
鍜?/p>
1 D
銆?/p>
0
鍜?/p>
1
3
锛庢柟绋?/p>
x
2
锕?/p>
2x+3=0
鐨勬牴鐨勬儏鍐垫槸锛?/p>
锛?/p>
A
锛庢湁涓や釜鐩哥瓑鐨勫疄鏁版牴
B
锛庡彧鏈変竴涓疄鏁版牴
C
锛庢病鏈夊疄鏁版牴
D
锛庢湁涓や釜涓嶇浉绛夌殑瀹炴暟鏍?/p>
4
锛庡鍥?/p>
1
锛?/p>
A
锛?/p>
B
锛?/p>
C
鏄姍O
涓婄殑涓変釜鐐癸紝鈭燗BC=25掳锛屽垯鈭燗OC
鐨勫害鏁版槸锛?/p>
锛?/p>
A
锛?5掳
B
锛?0掳
C
锛?0掳
D
锛?0掳
5
锛?/p>
鈯橭
鐨勫崐寰勪负
7cm
锛?/p>
鐐?/p>
P
鍒板渾蹇?/p>
O
鐨勮窛绂?/p>
OP=10cm
锛?/p>
鍒欑偣
P
涓庘姍O
鐨勪綅缃叧绯讳负
锛?/p>
锛?/p>
A
锛庣偣
P
鍦ㄥ渾涓?/p>
B
锛庣偣
P
鍦ㄥ渾鍐?/p>
C
锛庣偣
P
鍦ㄥ渾澶?/p>
D
锛庢棤娉曠‘瀹?/p>
6
锛庡湪骞抽潰鐩磋鍧愭爣绯讳腑锛屸姍P
鐨勫渾蹇冨潗鏍囦负锛?/p>
4
锛?/p>
8
锛夛紝鍗婂緞涓?/p>
5
锛岄偅涔?/p>
x
杞翠笌鈯橮
鐨勪綅
缃叧绯绘槸锛?/p>
锛?/p>
A
锛庣浉浜?/p>
B
锛庣浉绂?/p>
C
锛庣浉鍒?/p>
D
锛庝互涓婇兘涓嶆槸
7
锛庡浜庝簩娆″嚱鏁?/p>
y=
锛?/p>
x-1
锛?/p>
2
+2
鐨勫浘璞★紝涓嬪垪璇存硶姝ｇ‘鐨勬槸锛?/p>
锛?/p>
A
锛庡紑鍙ｅ悜涓?/p>
B
锛庡绉拌酱鏄?/p>
x=-1
C
锛庨《鐐瑰潗鏍囨槸锛?/p>
1
锛?/p>
2
锛?/p>
D
锛庝笌
x
杞存湁涓や釜浜ょ偣
8
锛庝竴涓墖褰㈢殑寮ч暱鏄?/p>
20
蟺
cm
锛岄潰绉槸
240
蟺
cm
2
锛屽垯杩欎釜鎵囧舰鐨勫渾蹇冭绛変簬锛?/p>
锛?/p>
A
锛?/p>
160
掳
B
锛?/p>
15
0掳
C
锛?/p>
120
掳
D
锛?/p>
6
0掳
9
锛庡鍥?/p>
2
鎵�绀猴紝
P
涓衡姍
O
澶栦竴鐐癸紝
PA
銆?/p>
PB
鍒嗗埆鍒団姍
O
浜?/p>
A
銆?/p>
B
锛?/p>
CD
鍒団姍
O
浜庣偣
E
锛屽垎鍒氦
PA
銆?/p>
PB
浜庣偣
C
銆?/p>
D
锛岃嫢
PA=15
锛屽垯鈻?/p>
PCD
鐨勫懆闀夸负锛?/p>
锛?/p>
A
锛?/p>
15 B
锛?/p>
12 C
锛?/p>
20 D
锛?/p>
30
10
锛庡叧浜?/p>
x
鐨勬柟绋?/p>
kx
2
+2x
锕?/p>
1=0
鏈夊疄鏁版牴锛屽垯
k
鐨勫彇鍊艰寖鍥存槸锛?/p>
锛?/p>
E
A
C
B
D
P
O
鍥?/p>
2
鍥?/p>
1