2021骞村寳浜叕鍕�(w霉)鍝¤€冭│琛屾脯鏁�(sh霉)瀛�(xu茅)閬嬬畻绶寸繏(x铆)椤岋紙31锛�
鐎忚
鏀惰棌
2021骞村寳浜叕鍕�(w霉)鍝¤€冭│琛屾脯鏁�(sh霉)瀛�(xu茅)閬嬬畻绶寸繏(x铆)椤岋紙31锛�
1.宸茬煡鑷杌婅垏鎽╂墭杌婄殑閫熷害姣旀槸2:3锛屾懇鎵樿粖鑸囨苯杌婄殑閫熷害姣旀槸2:5.宸茬煡姹借粖15鍒嗛悩姣旇嚜琛岃粖澶氳蛋11鍏噷锛屽晱鑷杌�30鍒嗛悩姣旀懇鎵樿粖灏戣蛋澶氬皯鍏噷?
A. 2
B. 4
C. 6
D. 8
2.寰�1銆�2銆�3銆�4銆�5涓毃姗�(j墨)鎶藉彇3鍊嬫暩(sh霉)锛屽晱閫�3鍊嬫暩(sh霉)涔嬪拰鑷冲皯鑳借鍏朵腑涓€鍊嬫暩(sh霉)鏁撮櫎鐨勬鐜囨槸澶氬皯?
A. 10%
B. 30%
C. 60%
D. 90%
3.鏌愮ぞ鍗€(q奴)鍦栨浉椁ㄦ竻榛炲湒鏇稿韩瀛橈紝鐧�(f膩)鐝�(xi脿n)鎿佹湁浜烘枃绀剧椤炲湒鏇告暩(sh霉)閲忔槸鑷劧绉戝(xu茅)椤炲湒鏇哥殑2鍊�锛屾瘮鍏掔鍦栨浉澶�15鍐�锛屾搧鏈夌殑鍏掔鍦栨浉鏄敓娲绘噳(y墨ng)鐢ㄩ鍦栨浉鐨�1/3锛屽叾浠栭鍦栨浉76鍐婏紝鍗犳墍鏈夊湒鏇哥殑1/6锛屽晱瑭茬ぞ鍗€(q奴)鍦栨浉椁ㄦ搧鏈夎嚜鐒剁瀛�(xu茅)鍦栨浉澶氬皯鍐�?
A. 32
B. 36
C. 40
D. 48
4.闆滆波搴楁墦鐑婂悗锛屾敹閵€姗�(j墨)涓湁1鍏�銆�10鍏冨拰100鍏冪殑绱欏梗鍏�60寮碉紝鍟忛€欎簺绱欏梗鐨勭附闈㈠€煎彲鑳界偤澶氬皯鍏�?
A. 2100
B. 2400
C. 2700
D. 3000
5.鏌愮彮绱氭湁鐢风敓6鍚�锛屽コ鐢�4鍚嶏紝鐝�(xi脿n)浠ラ毃姗�(j墨)鎶界敖鐨勫舰寮忛伕鍙栦笁浜哄弮鍔犳紨璎涙瘮璩�锛屽晱鎶藉埌涓€鍚嶇敺鐢熷叐鍚嶅コ鐢熺殑姒傜巼鍦ㄤ互涓嬪摢鍊嬭寖鍦嶄箣鍏�(n猫i)?
A. 25%-35%
B. 楂樹簬35%
C. 浣庝簬15%
D. 15%-25%
婧Θ鎻愮ず锛�榛炴搳涓嬮爜鏌ョ湅2021骞村寳浜叕鍕�(w霉)鍝¤€冭│琛屾脯鏁�(sh霉)瀛�(xu茅)閬嬬畻绶寸繏(x铆)椤岋紙31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 鍏嶈不闋�(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″牨鍚嶆檪闁撱€佺瓎瑭︽檪闁撶⒑瀹氭檪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�銆�
1.B銆愯В鏋愩€戣嚜琛岃粖锛氭懇鎵樿粖锛氭苯杌�=4:6:15锛屾牴鎿�(j霉)椤屾剰鍙緱鑷杌婄殑閫熷害鐐�4km/15min锛屾懇鎵樿粖鐨勯€熷害鐐�6km/15min锛屾苯杌婄殑閫熷害鐐�15km/15min锛屽洜姝よ嚜琛岃粖30鍒嗛悩姣旀苯杌婂皯璧�4鍗冪背銆�
2.銆愯В鏋愩€戜笁鍊嬫暩(sh霉)涓彧瑕佸惈鏈�1灏辫兘婊胯冻锛屽叡C4,2=6绋紝涓夊€嬫暩(sh霉)涓惈鏈�2鐨勮┍锛屼笁鍊嬫暩(sh霉)鐨勫拰蹇呴爤鏄伓鏁�(sh霉)锛屽叡C3,2-1=2绋�锛屼笉鍚�1鍜�2鍙湁3銆�4銆�5鑳借3鏁撮櫎锛屽洜姝ゅ叡鏈�9绋豢瓒崇殑鎯呮硜锛岀附鏁�(sh霉)鐐篶5,3=10锛屾鐜囩偤9/10=90%銆�
3.銆愯В鏋愩€戣ō(sh猫)浜烘枃=2x锛岃嚜鐒�=x锛屽厭绔�=2x-15锛岀敓娲�=6x-45锛�2x+x+2x-15+6x-45=76×6-76=380锛岃В寰梮=40銆�
4.銆愯В鏋愩€戞牴鎿�(j霉)閬搁爡鍙煡100鐨勬暩(sh霉)閲忓湪20-30涔嬮枔锛�30<1鍏�+10鍏冪殑鏁�(sh霉)閲�<40锛�1鍏冪殑鏁�(sh霉)閲忓繀闋堢偤10鐨勫€嶆暩(sh霉)锛屽鏋�1鍏冩湁10寮�锛�10鍏冪殑鏈�29寮碉紝100鍏冪殑21寮�锛岀附鏁�(sh霉)2400婊胯冻椤屾剰銆�
5.銆愯В鏋愩€戞牴鎿�(j霉)椤屾剰姒傜巼鐐猴細C6,1×C4,2/C10,3=36/120=30%锛岀瓟妗堥伕A銆�
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