福建省厦门市2020-2021学年八年级上学期期末质量检测数学试题(含答案).pdf

2020鈥?021 瀛﹀勾锛堜笂锛夊帵闂ㄥ競鍒濅簩骞磋川閲忔娴 鏁 瀛

娉ㄦ剰浜嬮」鈭?.鍏ㄥ嵎涓夊ぇ棰橈紝25 灏忛锛岃瘯鍗峰叡5 椤碉紝鍙︽湁绛旈鍗? 2.绛旀蹇呴』鍐欏湪绛旈鍗′笂锛屽惁鍒欎笉鑳藉緱 . 3.鍙互鐩存帴浣跨敤 2B 閾呯瑪浣滃浘.

涓€銆侀€夋嫨棰橈紙鏈ぇ棰樻湁10灏忛锛屾瘡灏忛4鍒嗭紝鍏?0 .姣忓皬棰橀兘鏈夊洓涓€夐」锛屽叾涓湁涓斿彧鏈変竴涓€夐」姝ｇ‘锛

1.璁＄畻 20 鐨勭粨鏋滄槸 1

A.0 B. C.1 D.2 2

2.璁＄畻6m 梅3m 鐨勭粨鏋滄槸

A.2 B.2m C.3m D.2m2

3.鍦ㄥ钩闈㈢洿瑙掑潗鏍囩郴xOy 涓紝鐐癸紙2锛?锛夊叧浜巠 杞村绉扮殑鐐瑰湪

A.绗竴璞￠檺 B.绗簩璞￠檺 C.绗笁璞￠檺 D.绗洓璞￠檺

4.鑻D 鏄柍ABC 鐨勪腑绾匡紝鍒欎笅鍒楃粨璁烘纭殑鏄 1

A.AD 鈯C B.BD=CD C. 鈭燘AD= 鈭燙AD D.AD= BC 2

5.濡傚浘1锛岀偣B 锛孋 鍒嗗埆鍦ㄢ垹EAF 鐨勮竟AE 锛孉F 涓婏紝鐐笵 鍦ㄧ嚎娈礎C 涓婏紝鍒欎笅鍒楁槸鈻矨BD 鐨勫瑙掔殑鏄

A. 鈭燘CF B. 鈭燙BE C. 鈭燚BC D. 鈭燘DF 2 2

6.鏁村紡肀 鈭?涓巒 锛媙 鐨勫叕鍥犲紡鏄

A.n B.n2 C.n 锛? D. n-1 2 2 2

7.杩愮敤鍏紡a +2ab 锛?=(a锛媌) 鐩存帴瀵规暣寮?x +4x+1 杩涜鍥犲紡鍒嗚В锛屽叕寮忎腑鐨刟 鍙互鏄 A.2x2 B.4x2 C.2x D.4x

8.濡傚浘2 锛屽凡鐭モ柍ABC 涓庘柍BDE 鍏ㄧ瓑锛屽叾涓偣D 鍦ㄨ竟 AB 涓婏紝AB>BC 锛孊D=CA 锛孌E/AC 锛孊C 涓嶥E 浜や簬

鐐笷 锛屼笅鍒椾笌AD+AC 鐩哥瓑鐨勬槸

B.BE A.DE C.BF D.DF