D
B
C
A
娉板叴甯?/p>
2019
骞寸瀛︽湡鍒濅簩鏁板鏈熸湯璇曢
(
鑰冭瘯鏃堕棿锛?/p>
120
鍒嗛挓
鎬诲垎锛?/p>
100
鍒?/p>
)
璇锋敞鎰忥細鑰冪敓椤诲皢鏈嵎鎵�鏈夌瓟妗堢瓟鍒扮瓟棰樺崱涓婏紝绛斿湪璇曞嵎涓婃棤鏁堬紒
涓�锛庨�夋嫨棰?/p>
(
姣忛
2
鍒嗭紝鍏?/p>
12
鍒?/p>
)
1
锛庡湪浠ヤ笅缁胯壊椋熷搧銆佸洖鏀躲�佽妭鑳姐�佽妭姘村洓涓爣蹇椾腑锛屾槸杞村绉板浘褰㈢殑鏄?/p>
A
锛?/p>
B
锛?/p>
C
锛?/p>
D
锛?/p>
2.
鍦ㄤ笅鍒楀疄鏁颁腑锛屾棤鐞嗘暟鏄?/p>
A
锛?/p>
5
B
锛?/p>
7
C
锛?/p>
0
D
锛?/p>
3
锛庝笅鍒楀洓缁勭嚎娈典腑锛屽彲浠ユ瀯鎴愮洿瑙掍笁瑙掑舰鐨勬槸
A
锛?/p>
4
锛?/p>
5
锛?/p>
6
B
锛?/p>
1.5
锛?/p>
2
锛?/p>
2.5
C
锛?/p>
2
锛?/p>
3
锛?/p>
4
D
锛?/p>
1
锛?/p>
2
锛?/p>
3
4.
涓嬪垪鍚勫紡璁＄畻姝ｇ‘鐨勬槸
A
锛?/p>
5
3
2
飥?/p>
飥?/p>
B
锛?/p>
1
3
3
3
4
飥?/p>
飥?/p>
C
锛?/p>
3
6
3
3
3
2
飥?/p>
飩?/p>
D
锛?/p>
3
3
27
飥?/p>
飩?/p>
5.
鑻ョ偣
A(鈥?
锛?/p>
y
1
)
锛?/p>
B(2
锛?/p>
y
2
)
锛?/p>
C(3
锛?/p>
y
3
)
鏄嚱鏁?/p>
2
飥?/p>
飥?/p>
飥?/p>
x
y
鍥惧儚涓婄殑鐐癸紝鍒?/p>
A
锛?/p>
3
2
1
y
y
y
飥?/p>
飥?/p>
B
锛?/p>
3
2
1
y
y
y
飥?/p>
飥?/p>
C
锛?/p>
2
3
1
y
y
y
飥?/p>
飥?/p>
D
锛?/p>
1
3
2
y
y
y
锛?/p>
锛?/p>
6.
濡傚浘锛屽湪鏂规牸绾镐腑锛屼互
AB
涓轰竴杈逛綔鈻?/p>
ABP
锛?/p>
浣夸箣涓庘柍
ABC
鍏ㄧ瓑锛屼粠
P
1
锛?/p>
P
2
锛?/p>
P
3
锛?/p>
P
4
鍥涗釜
鐐逛腑鎵惧嚭绗﹀悎鏉′欢鐨勭偣
P
锛屽垯鐐?/p>
P
鏈?/p>
A
锛?/p>
1
涓?/p>
B
锛?/p>
2
涓?/p>
C
锛?/p>
3
涓?/p>
D
锛?/p>
4
涓?/p>
浜岋紟濉┖棰?/p>
(
姣忛
2
鍒嗭紝鍏?/p>
20
鍒?/p>
)
7.
瑕佷娇浜屾鏍瑰紡
x
2
3
飥?/p>
鏈夋剰涔夛紝
鍒?/p>
x
鐨勫彇鍊艰寖鍥存槸
.
8.
鍦扮悆鐨勫崐寰勭害涓?/p>
3
6.4
10
飩?/p>
銕?/p>
,
杩欎釜杩戜技鏁扮簿纭埌
浣?/p>
.
9.
鑻ョ瓑鑵颁笁瑙掑舰鐨勪袱杈归暱鍒嗗埆涓?/p>
4
鍜?/p>
8
锛屽垯杩欎釜涓夎褰㈢殑鍛ㄩ暱涓?/p>
.
10.
濡傚浘锛屽凡鐭?/p>
BC=EC
锛屸垹
BCE=
鈭?/p>
ACD
锛屽鏋滃彧娣诲姞涓�涓潯浠朵娇鈻?/p>
ABC
鈮屸柍
DEC
锛屽垯娣诲姞鐨勬潯浠朵负
(
娣诲姞涓�涓潯浠跺嵆鍙?/p>
).
绗?/p>
10
棰?/p>
绗?/p>
12
棰?/p>
11.
灏嗕竴娆″嚱鏁?/p>
y
=2x
鐨勫浘鍍忓悜涓婂钩绉?/p>
1
涓崟浣嶏紝鎵�寰楀浘鍍忓搴旂殑鍑芥暟琛ㄨ揪寮忎负
.
12.
濡傚浘鎵�绀虹殑鍥惧舰涓?/p>
,
鎵�鏈夌殑鍥涜竟褰㈤兘鏄鏂瑰舰
,
鎵�鏈夌殑涓夎褰㈤兘鏄洿瑙掍笁瑙掑舰
,
鑻ユ鏂瑰舰
A
銆?/p>
B
銆?/p>
C
銆?/p>
D
鐨?
闈㈢Н鍜屾槸
49cm
2
,
鍒欏叾涓渶澶х殑姝ｆ柟褰?/p>
S
鐨勮竟闀夸负
cm.
13.
鍦ㄢ柍
ABC
涓紝
AB=4
锛?/p>
AC=3
锛?/p>
AD
鏄柍
ABC
鐨勮骞冲垎绾匡紝
鍒欌柍
ABD
涓庘柍
ACD
鐨勯潰绉箣姣旀槸
锛?/p>