榛勫唸甯?/p>
2018
骞村垵涓瘯涓氱敓瀛︿笟姘村钩鍜岄珮涓樁娈靛鏍℃嫑鐢熻�冭瘯
鏁?/p>
瀛?/p>
璇?/p>
棰?/p>
锛堣�冭瘯鏃堕棿
120
鍒嗛挓
婊″垎
120
鍒嗭級
绗厾鍗凤紙閫夋嫨棰?/p>
鍏?/p>
18
鍒嗭級
涓�銆侀�夋嫨棰?/p>
锛堟湰棰樺叡
6
灏忛锛屾瘡灏忛
3
鍒嗭紝鍏?/p>
18
鍒嗐�傛瘡灏忛缁欏嚭
4
涓�夐」涓紝鏈変笖鍙?/p>
鏈変竴涓瓟妗堟槸姝ｇ‘鐨勶級
1. -
3
2
鐨勭浉鍙嶆暟鏄?/p>
A. -
2
3
B. -
3
2
C.
3
2
D.
2
3
2.
涓嬪垪杩愮畻缁撴灉姝ｇ‘鐨勬槸
A. 3a
3
路
2a
2
=
6a
6
B. (-2a)
2
= -4a
2
C. tan45
掳
=
2
2
D. cos30
掳
=
2
3
3.
鍑芥暟
y=
1
1
飥?/p>
飥?/p>
x
x
涓嚜鍙橀噺
x
鐨勫彇鍊艰寖鍥存槸
A
锛?/p>
x
鈮?/p>
-1
涓?/p>
x
鈮?/p>
1 B.x
鈮?/p>
-1 C. x
鈮?/p>
1 D. -1
鈮?/p>
x
锛?/p>
1
4.
濡傚浘锛屽湪
鈻?/p>
ABC
涓紝
DE
鏄?/p>
AC
鐨勫瀭鐩村钩鍒嗙嚎锛屼笖鍒嗗埆浜?/p>
BC
锛?/p>
AC
浜庣偣
D
鍜?/p>
E
锛屸垹
B
锛?
60
掳锛屸垹
C
锛?/p>
25
掳锛屽垯鈭?/p>
BAD
涓?/p>
A.5
0
掳
B.7
0
掳
C.75
掳
D.8
0
掳
锛堢
4
棰樺浘锛?/p>
5.
濡傚浘锛屽湪
Rt
鈻?/p>
ABC
涓紝鈭?/p>
ACB=90
掳锛?/p>
CD
涓?/p>
AB
杈逛笂鐨勯珮锛?/p>
CE
涓?/p>
AB
杈逛笂鐨勪腑绾匡紝
AD=2
锛?/p>
CE=5
锛屽垯
CD=
A.2
B.3
C.4
D.2
3
锛堢
5
棰樺浘锛?/p>