2021骞翠笂娴峰叕鍕�(w霉)鍝¤€冭│琛屾脯(c猫)鏁�(sh霉)閲忛棞(gu膩n)绯绘ā鎿锛�51锛�
鐎忚
鏀惰棌
2021骞翠笂娴峰叕鍕�(w霉)鍝¤€冭│琛屾脯(c猫)鏁�(sh霉)閲忛棞(gu膩n)绯绘ā鎿锛�51锛�
1.鐢�銆佷箼浜屼汉涓婂崍8榛�(di菐n)鍚屾檪(sh铆)寰炴澅鏉戦◣杌婂埌瑗挎潙鍘伙紝鐢叉瘡灏忔檪(sh铆)姣斾箼澶氶◣6鍗冪背锛屼腑鍗�12榛�(di菐n)鐢插埌閬�(d谩)瑗挎潙鍚庣珛鍗宠繑鍥炴澅鏉�锛屽湪璺濊タ鏉�15鍗冪背铏曢亣鍒颁箼銆傛澅銆佽タ鍏╂潙鐩歌窛( )鍗冪背銆�
A.30
B.40
C.60
D.80
2.鏌愰啱(y墨)闄㈡湁涓€姘ф埃缃愬嫽閫熸紡姘�锛岃┎姘ф埃缃愬厖婊垮悗鍚屾檪(sh铆)渚�40浜哄惛姘�锛�60鍒嗛悩鍚庢哀姘ｈ€楃洝锛屽啀娆″厖婊胯┎姘ф埃缃愬悓鏅�(sh铆)渚�60鍊�(g猫)浜哄惛姘э紝鍓�45鍒嗛悩鍚庢哀姘ｈ€楃洝銆傚晱濡傛灉瑭叉哀姘ｇ綈鍏呮豢鍚庣劇浜哄惛姘э紝姘ф埃鑰楃洝闇€瑕佸闀�(zh菐ng)鏅�(sh铆)闁�?
A.1.5灏忔檪(sh铆)
B.2灏忔檪(sh铆)
C.2.5灏忔檪(sh铆)
D.3灏忔檪(sh铆)
3.灏忔槑鍜屽皬绱呯⿳妤靛弮鍔犵磪闋�(l菒ng)宸惧劜(ch菙)钃勬椿鍕�(d貌ng)锛屾妸闆剁敤閷㈠瓨鍏ラ妧琛�銆傚皬鏄庡瓨鍏ラ妧琛岀殑閷㈡瘮灏忕磪灏�20鍏�銆傚鏋滃叐浜洪兘寰為妧琛屽彇鍑�12鍏冭卜瀛�(xu茅)缈�(x铆)鐢ㄥ搧锛岄偅涔堝皬绱呭墿涓嬬殑閷㈡槸灏忔槑鐨�3鍊�銆傚晱鍏╀汉鍘熶締鍏卞瓨鍏ラ妧琛屽灏戝厓?( )
A.44
B.64
C.75
D.86
4.涓変綅鑰佸斧鐐�10骞呬綔鍝佹姇绁�锛屾瘡浣嶈€佸斧鍒嗗垾閮芥姇鍑轰簡5绁�锛屽苟涓旀瘡骞呬綔鍝侀兘鏈夎€佸斧鎶曠エ銆傚鏋滀笁浣嶈€佸斧閮芥姇绁ㄧ殑浣滃搧鍒楃偤A绛�锛屽叐浣嶈€佸斧鎶曠エ鐨勫垪鐐築绛�锛屽儏鏈変竴浣嶈€佸斧鎶曠エ鐨勪綔鍝佸垪鐐篊绛夛紝鍓囦笅鍒楄娉曟纰虹殑鏄�( )銆�
A.A绛夊拰B绛夊叡6骞�
B.B绛夊拰C绛夊叡7骞�
C.A绛夋渶澶氭湁5骞�
D.A绛夋瘮C绛夊皯5骞�
5.閬庨暦(zh菐ng)鏂归珨涓€鍋�(c猫)闈㈢殑鍏╂灏�(du矛)瑙掔窔浜ら粸(di菐n)锛岃垏涓嬪簳闈㈠洓鍊�(g猫)闋傞粸(di菐n)閫ｅ緱涓€鍥涙１閷�锛屽墖鍥涙１閷愯垏闀�(zh菐ng)鏂归珨鐨勯珨绌嶆瘮鐐哄灏�?( )
A.1鈭�8
B.1鈭�6
C.1鈭�4
D.1鈭�3
婧Θ鎻愮ず锛�榛�(di菐n)鎿婁笅闋�(y猫)鏌ョ湅2021骞翠笂娴峰叕鍕�(w霉)鍝¤€冭│琛屾脯(c猫)鏁�(sh霉)閲忛棞(gu膩n)绯绘ā鎿锛�51锛夌殑绛旀銆�2021骞翠笂娴峰叕鍕�(w霉)鍝¤€冭│鏅�(sh铆)闁撶偤2020骞�12鏈�13鏃�锛岀挵(hu谩n)鐞冪恫(w菐ng)鏍″皬绶ㄦ帹钖﹀悇浣嶈€冪敓浣跨敤 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骞翠笂娴峰叕鍕�(w霉)鍝＄瓎瑭︽檪(sh铆)闁�銆侀潰瑭︽檪(sh铆)闁撳埌渚嗗墠鏀跺埌鐭俊閫氱煡锛屾彁閱掑ぇ瀹跺仛濂借€冨墠婧�(zh菙n)鍌�銆�
1.绛旀: C
2.绛旀: D
瑙ｆ瀽:
閫欐槸涓€鍊�(g猫)璁婂舰鐨勭墰鍚冭崏鍟忛銆�
瑷�(sh猫)鍘熸湁姘ф埃鐐篗锛屾紡姘ｉ€熷害鐐篤锛屽墖鍙緱(40+V)×60=(60+V)×45=M锛岃В寰梀=20锛孧=3600锛屽鏋滄矑浜哄惛姘�锛屽墖鍙緱鑰楃洝鐨勬檪(sh铆)闁撶偤3600÷20=180鍒嗛悩锛屽嵆3灏忔檪(sh铆)銆傛晠姝ｇ⒑绛旀鐐篋銆�
3.绛旀: B
瑙ｆ瀽:
瑷�(sh猫)灏忔槑鍘熶締瀛樹簡Y鍏冿紝鍓囧皬绱呭瓨浜哬+20鍏�锛屾牴鎿�(j霉)椤屾剰寰�(Y-12)×3=(Y+20-12)锛岃В寰梇=22鍏�銆傚洜姝ゅ叐浜哄師渚嗗叡瀛樹簡2Y+20=64鍏�锛屾晠姝ｇ⒑绛旀鐐築銆�
4.绛旀: D
瑙ｆ瀽:
瑙ｆ瀽1锛�
鍒嗗垾浠ョ瓑绱�(j铆)浠ｈ〃鍏舵暩(sh霉)閲�锛屾牴鎿�(j霉)椤屾剰鍙緱
A+B+C=10……鈶�; 3A+2B+C=15……鈶�
鈶�-鈶�×2鍙緱锛欳-A=5锛屽洜姝ゆ纰虹瓟妗堢偤D銆�
瑙ｆ瀽2锛�
浠ｅ叆閬搁爡(xi脿ng)娉�銆傛牴鎿�(j霉)椤屾剰鍙緱
A+B+C=10……鈶�; 3A+2B+C=15……鈶�
姝ゆ檪(sh铆)鏈�3鍊�(g猫)鏈煡閲忥紝鍙湁2鍊�(g猫)鏂圭▼锛屽吀鍨嬬殑涓嶅畾鏂圭▼鍟忛銆傚皣閬搁爡(xi脿ng)浠ｅ叆锛屼緷娆￠(y脿n)璀夋槸鍚︽垚绔嬪嵆鍙�銆備互閬搁爡(xi脿ng)A鐐轰緥锛岃嫢閬搁爡(xi脿ng)A姝ｇ⒑锛屽墖鏈夛細A+B=6銆傚埌姝ゅ緱鍒扮涓夊€�(g猫)鏂圭▼锛屼究鍙眰瑙ｆ鏂圭▼绲�锛屽緱C=4锛孉=-1锛孊=7銆傛晠鎺掗櫎A銆�
椤炰技鐨勬柟娉曞彲鎺掗櫎閬搁爡(xi脿ng)B銆丆銆傛晠姝ｇ⒑绛旀鐐篋銆�
瑙ｆ瀽3锛�
鏍规摎(j霉)椤屾剰鍙緱
A+B+C=10……鈶�; 3A+2B+C=15……鈶�
鐢扁憽-鈶犳秷鍘籆锛屽彲寰�2A+B=5銆傜敱浜嶢銆丅銆丆鍧囩偤闈炶矤(f霉)鏁存暩(sh霉)锛岀敱姝ゅ彲鐭�0≤2A≤5锛屽洜姝鍙兘鍙栧€�0銆�1銆�2銆備緷娆′唬鍥�锛屽彲寰桝銆丅銆丆鐨勫彲鑳藉彇鍊肩偤0銆�5銆�5;1銆�3銆�6;2銆�1銆�7涓夌ó鎯呭舰锛屽彧鏈夐伕闋�(xi脿ng)D涓婅堪涓夌祫鏁�(sh霉)鎿�(j霉)閮界鍚�銆傛晠姝ｇ⒑绛旀鐐篋銆�
瑙ｆ瀽4锛�
鏍规摎(j霉)椤屾剰鍙緱
A+B+C=10……鈶�; 3A+2B+C=15……鈶�
灏�(du矛)涓嶅畾鏂圭▼鑰岃█锛屽線寰€涓嶈兘寰楀埌鍞竴鐨勪竴绲勮В銆備絾寰為伕闋�(xi脿ng)瀹规槗鐪嬪嚭锛屽彧瑕佹眰鍑哄叾涓竴绲勮В鍗冲彲椹�(y脿n)璀変笉绗﹀悎鐨勯伕闋�(xi脿ng)锛屽皣鍏舵帓闄ゆ帀鍗冲彲銆傚洜姝や护A(y霉)=0锛岀櫦(f膩)鐝�(xi脿n)B=5銆丆=5锛岀鍚堥潪璨�(f霉)鏁存暩(sh霉)瑕佹眰銆傛鏅�(sh铆)鍙繀閫熸帓闄ゅ墠鍏╁€�(g猫)閬搁爡(xi脿ng)锛岃€岄伕闋�(xi脿ng)C椤劧閷�(cu貌)瑾�銆傛晠姝ｇ⒑绛旀鐐篋銆�
5.绛旀: B
瑙ｆ瀽:
绛夊簳绛夐珮鏅�(sh铆)锛屾楂旈珨绌嶆槸鏌遍珨鐨�1/3銆傝€岄€欓噷妞庨珨鐨勯珮鏄煴楂旈珮鐨勪竴鍗�锛屽洜姝よ┎鍥涙１閷愯垏闀�(zh菐ng)鏂归珨鐨勯珨绌嶄箣姣旂偤1锛�6锛屾晠姝ｇ⒑绛旀鐐築銆�
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