椴佹暀鐗?/p>
2019
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B
锛堥檮绛旀锛?/p>
1
锛庡凡鐭ラ潪鐩磋涓夎褰?/p>
ABC
涓紝
鈭?/p>
A=45掳
锛岄珮
BD
涓?/p>
CE
鎵�鍦ㄧ洿绾夸氦浜庣偣
H
锛屽垯
鈭?/p>
BHC
鐨勫害鏁版槸锛堬級
A
锛?/p>
45掳
B
锛?/p>
45掳
鎴?/p>
135掳
C
锛?/p>
45掳
鎴?/p>
125掳
D
锛?/p>
135掳
2
锛庡涓嬩功鍐欑殑鍥涗釜缇庢湳瀛楋紝鍏朵腑涓鸿酱瀵圭О鐨勬槸锛?/p>
锛?/p>
A
锛?
B
锛?
C
锛?
D
锛?
3
锛?/p>
O
涓虹洿绾?/p>
l
澶栦竴鐐癸紝
A
锛?/p>
B
锛?/p>
C
涓夌偣鍦ㄧ洿绾?/p>
l
涓婏紝
OA
锛?/p>
4cm
锛?/p>
OB
锛?/p>
5cm
锛?/p>
OC
锛?/p>
1.5cm.
鍒欑偣
O
鍒扮洿绾?/p>
l
鐨勮窛绂?/p>
(
)
A
锛庡ぇ浜?/p>
1.5cm
B
锛庣瓑浜?/p>
1.5cm
C
锛庡皬浜?/p>
1.5cm
D
锛庝笉澶т簬
1.5cm
4
锛庡鍥撅紝骞冲畨璺笌骞哥璺槸涓ゆ潯骞宠鐨勯亾璺紝涓旈兘涓庢柊鍏村ぇ琛楀瀭鐩达紝鑰佽涓庡皬绫宠儭鍚?/p>
鍨傜洿锛?/p>
涔﹀簵浣嶄簬鑰佽涓庡皬绫宠儭鍚岀殑浜ゅ彛澶勶紟
濡傛灉灏忓己鍚屽绔欏湪骞冲畨璺笌鏂板叴澶ц浜ゅ弶璺?/p>
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锛?/p>
A
锛?/p>
300m
B
锛?/p>
400m
C
锛?/p>
500m
D
锛?/p>
700m
5
锛?/p>
5
锛庝笅鍒楄娉曟纭殑涓暟鏄紙
锛?/p>
锛?/p>
1
锛夎繛鎺ヤ袱鐐逛箣闂寸殑绾挎鍙袱鐐归棿鐨勮窛绂伙紱
锛?/p>
2
锛変袱鐐逛箣闂达紝绾挎鏈�鐭紱
锛?/p>
3
锛夎嫢
AB=2CB
锛屽垯鐐?/p>
C
鏄?/p>
AB
鐨勪腑鐐癸紱
锛?/p>
4
锛夎鐨勫ぇ灏忎笌瑙掔殑涓よ竟鐨勯暱鐭棤鍏筹紟
A
锛?/p>
1
涓?/p>
B
锛?/p>
2
涓?/p>
C
锛?/p>
3
涓?/p>
D
锛?/p>
4
涓?/p>
6
锛庡鍥撅紝
E
銆?/p>
B
銆?/p>
F
銆?/p>
C
鍥涚偣鍦ㄤ竴鏉＄洿绾夸笂锛屼笖
EB
=
CF
锛?/p>
鈭?/p>
A
=
鈭?/p>
D
锛屽鍔犱笅鍒楁潯浠朵腑鐨?/p>
涓�涓粛涓嶈兘璇佹槑
鈻?/p>
ABC
鈮屸柍
DEF
锛岃繖涓潯浠舵槸锛?/p>
锛?/p>
A
锛?/p>
DF
鈭?/p>
AC
B
锛?/p>
AB
=
DE
C
锛?/p>
鈭?/p>
E
=
鈭?/p>
ABC
D
锛?/p>
AB
鈭?/p>
DE
7
锛庡鍥撅紝灏?/p>
Rt
ABC
绾哥墖鐨勭洿瑙掕竟
AC
娌跨洿绾?/p>
AD
鎶樺彔锛屼娇瀹冭惤鍦ㄦ枩杈?/p>
AB
涓婏紝涓斾笌