2021骞村寳浜叕鍕�(w霉)鍝¤€冭│琛屾脯(c猫)鏁�(sh霉)閲忛棞(gu膩n)绯绘瘡鏃ヤ竴绶达紙15锛�
鐎忚
鏀惰棌
2021骞村寳浜叕鍕�(w霉)鍝¤€冭│琛屾脯(c猫)鏁�(sh霉)閲忛棞(gu膩n)绯绘瘡鏃ヤ竴绶达紙15锛�
1.0锛�4锛�18锛�48锛�100锛�( )
A.140
B.160
C.180
D.200
2.2锛�3锛�13锛�175锛�( )
A.30625
B.30651
C.30759
D.30952
3.10鍊�(g猫)绠卞瓙绺介噸100鍏枻锛屼笖閲嶉噺鎺掑湪鍓嶄笁浣嶆暩(sh霉)鐨勭瀛愮附閲嶄笉瓒呴亷(gu貌)閲嶉噺鎺掑湪鍚庝笁浣嶇殑绠卞瓙绺介噸鐨�1.5鍊�锛屽晱(w猫n)鏈€閲嶇殑绠卞瓙閲嶉噺鏈€澶氭槸澶氬皯鍏枻?
A.500/23
B.200/11
C.20
D.25
4.7.1锛�8.6锛�14.2锛�16.12锛�28.4锛�( )
A.32.24
B. 30.4
C. 32.4
D. 30.24
婧Θ鎻愮ず锛�榛�(di菐n)鎿婁笅闋�(y猫)鏌ョ湅2021骞村寳浜叕鍕�(w霉)鍝¤€冭│琛屾脯(c猫)鏁�(sh霉)閲忛棞(gu膩n)绯绘瘡鏃ヤ竴绶达紙15锛夌殑绛旀銆�2021骞村寳浜叕鍕�(w霉)鍝¤€冭│灏囦簬浠婂勾12鏈堜唤鑸夎锛屽皬绶ㄦ帹钖﹀悇浣嶈€冪敓浣跨敤鐠�(hu谩n)鐞冪恫(w菐ng)鏍� 鍏嶈不(f猫i)闋�(y霉)绱勭煭淇℃彁閱�鏈嶅嫏(w霉)锛岄爯(y霉)绱勬垚鍔熷彲鍦�2021骞村寳浜叕鍕�(w霉)鍝″牨(b脿o)鍚嶆檪(sh铆)闁撱€佺瓎瑭︽檪(sh铆)闁撶⒑瀹氭檪(sh铆)鏀跺埌鐭俊閫氱煡锛屾彁閱掑ぇ瀹舵彁鍓嶅仛濂芥簴(zh菙n)鍌欍€�
1.绛旀: C
2.绛旀: B
瑙ｆ瀽: 瑙€瀵熸暩(sh霉)鍒�锛岀櫦(f膩)鐝�(xi脿n)鏁�(sh霉)鍒楄畩鍖栬定鍕�(sh矛)姣旇純鎬ワ紝鍙互鑰冩叜閬炴帹鏁�(sh霉)鍒�锛屽彲浠ョ櫦(f膩)鐝�(xi脿n)2×2+3^2=13锛�2×3+13^2=175锛屽墖鏁�(sh霉)鍒楃殑璁婂寲瑕�(gu墨)寰嬬偤2×An+(An+1)^2=An+2锛屽洜姝�锛岄鐩殑鏈€鍚庝竴闋�(xi脿ng)=175^2+2×13=30651(娉細鏈瑷�(j矛)绠楀彲浠ュ埄鐢ㄥ熬鏁�(sh霉)娉曪細2×13+175^2鐨勫熬鏁�(sh霉)鐐�6+5=1锛屽熬鏁�(sh霉)鐐�1)銆傚洜姝わ紝鏈绛旀閬告搰B閬搁爡(xi脿ng)銆�
3.绛旀: A
瑙ｆ瀽:
瑕佷娇鏈€閲嶇殑绠卞瓙鐩″彲鑳界殑閲�锛屽墖鍏朵粬鐨勭瀛愭噳(y墨ng)瑭茬洝鍙兘鐨勮紩锛屾サ绔儏娉佺偤闄ゆ渶閲嶇殑绠卞瓙澶栧叾浠栫瀛愪竴妯ｉ噸锛屽苟涓旇紩浜庢渶閲嶇殑绠卞瓙銆傛摎(j霉)姝ゅ亣瑷�(sh猫)鏈€閲嶇殑绠卞瓙鑸囧叾浠栦换涓€绠卞瓙閲嶉噺鍒嗗垾鐐篘鍜孧锛屽墖鏈塏+9M=100锛孨>M锛孨+2M≤1.5×3M锛岃В寰桸≤500/23銆傛晠姝ｇ⒑绛旀鐐篈銆�
4.绛旀: A
瑙ｆ瀽:
鍚庝竴闋�(xi脿ng)鐨勬暣鏁�(sh霉)閮ㄥ垎鐐哄墠涓€闋�(xi脿ng)鐨勬暣鏁�(sh霉)閮ㄥ垎鍜屽皬鏁�(sh霉)閮ㄥ垎涔嬪拰锛屽悗涓€闋�(xi脿ng)鐨勫皬鏁�(sh霉)閮ㄥ垎鐐哄墠涓€闋�(xi脿ng)鐨勬暣鏁�(sh霉)閮ㄥ垎鍜屽皬鏁�(sh霉)閮ㄥ垎涔嬪樊銆傛墍浠�锛屾渶鍚庝竴闋�(xi脿ng)鐨勬暣鏁�(sh霉)閮ㄥ垎鐐�28+4=32锛屽皬鏁�(sh霉)閮ㄥ垎鐐�28-4=24銆傚洜姝�锛屾湰椤岀瓟妗堥伕鎿嘇閬搁爡(xi脿ng)銆�
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