2020骞寸敇鑲呭叕鍕�(w霉)鍝¤€冭│琛屾脯鏁�(sh霉)閲忛棞(gu膩n)绯荤反缈�(x铆)椤岋紙8鏈�18鏃ワ級
鐎忚
鏀惰棌
2020骞寸敇鑲呭叕鍕�(w霉)鍝¤€冭│琛屾脯鏁�(sh霉)閲忛棞(gu膩n)绯荤反缈�(x铆)椤岋紙8鏈�18鏃ワ級
1.鐢蹭箼鍏╀汉鍦ㄧ帺涓€鍊嬫矙鐩ゆ父鎴诧紝姣旇辰鐨勮(gu墨)鍓囨槸锛氬湪涓€鍊嬪垎鐐�50鍊嬪柈浣嶇殑鍗€(q奴)鍩熶笂锛屾瘡浜鸿吉娴佸幓鍔冨畾閫欎簺鍗€(q奴)鍩熶綔鐐鸿嚜宸辩殑闋�(l菒ng)鍦�锛屾瘡娆″彲浠ュ妰瀹�1鍒�5鍊嬪柈浣嶏紝瑾颁綔鐐烘渶鍚庡妰瀹氬崁(q奴)鍩熺殑浜哄墖鐐哄嫕鍒╄€�锛屽鏋滅敱鐢插妰瀹�锛岄偅涔堢敳涓€闁嬪瑕佸妰瀹�( )鍊嬪柈浣�锛屾墠鑳戒繚璀夎嚜宸辩嵅鍕�銆�
A.1
B.2
C.3
D.4
2.鎿插叐鍊嬮瀛�锛屾摬鍑虹殑榛炴暩(sh霉)涔嬪拰鐐哄鏁�(sh霉)鐨勬鐜囩偤P1锛屾摬鍑虹殑榛炴暩(sh霉)涔嬪拰鐐哄伓鏁�(sh霉)鐨勬鐜囩偤P2锛屽晱锛歅1鍜孭2鐨勫ぇ灏忛棞(gu膩n)绯绘槸( )
A.P1=P2
B.P1>P2
C.P1
D.P1銆丳2鐨勫ぇ灏忛棞(gu膩n)绯荤劇娉曠⒑瀹�
3.瑷堢畻寰�1鍒�100(鍖呮嫭100)鑳借5鏁撮櫎鐨勬墍鏈夋暩(sh霉)鐨勫拰?( )
A.1100
B.1150
C.1200
D.1050
4.灏忓嫉璩艰卜浜�2鍊嬭構鏋�銆�3鏍归钑夈€�4鍊嬮潰鍖呭拰5濉婅泲绯�锛屽叡娑堣不58鍏冦€傚鏋滃洓绋晢鍝佺殑鍠児閮芥槸姝ｆ暣鏁�(sh霉)涓斿悇涓嶇浉鍚�锛屽墖姣忓铔嬬硶鐨勫児鏍兼渶楂樺彲鑳界偤澶氬皯鍏�? ( )
A.5
B.6
C.7
D.8
5.鏌愬厭绔ヨ棟琛�(sh霉)鍩硅〒(x霉n)涓績鏈�5鍚嶉嫾鐞存暀甯拰6鍚嶆媺涓佽垶鏁欏斧锛屽煿瑷�(x霉n)涓績灏囨墍鏈夌殑閶肩惔瀛�(xu茅)鍝″拰鎷変竵鑸炲(xu茅)鍝″叡76浜哄垎鍓钩鍧囧湴鍒嗙郸鍚勫€嬭€佸斧甯堕牁(l菒ng)锛屽墰濂借兘澶犲垎瀹�锛屼笖姣忎綅鑰佸斧鎵€甯剁殑瀛�(xu茅)鐢熸暩(sh霉)閲忛兘鏄唱(zh矛)鏁�(sh霉)銆傚悗渚嗙敱浜庡(xu茅)鐢熶汉鏁�(sh霉)娓涘皯锛屽煿瑷�(x霉n)涓績鍙繚鐣欎簡4鍚嶉嫾鐞存暀甯拰3鍚嶆媺涓佽垶鏁欏斧锛屼絾姣忓悕鏁欏斧鎵€甯剁殑瀛�(xu茅)鐢熸暩(sh霉)閲忎笉璁�锛岄偅涔堢洰鍓嶅煿瑷�(x霉n)涓績閭勫墿涓嬪(xu茅)鍝″灏戜汉?
A.36
B.37
C.39
D.41
婧Θ鎻愮ず锛�榛炴搳涓嬮爜鍙煡鐪�2020骞寸敇鑲呭叕鍕�(w霉)鍝¤€冭│琛屾脯鏁�(sh霉)閲忛棞(gu膩n)绯荤反缈�(x铆)椤岋紙8鏈�18鏃ワ級绛旀銆�2020骞寸敇鑲呭叕鍕�(w霉)鍝¤€冭│鏅傞枔鐐�8鏈�22鏃ワ紝寤鸿鍚勪綅鑰冪敓浣跨敤鐠�(hu谩n)鐞冪恫(w菐ng)鏍� 鍏嶈不闋�(y霉)绱勭煭淇℃彁閱�鏈嶅嫏(w霉)锛岄爯(y霉)绱勬垚鍔熸渻鍦ㄧ瓎瑭︽檪闁撳埌渚嗗墠鏀跺埌鐭俊锛屾彁閱掑ぇ瀹跺仛濂借€冨墠婧�(zh菙n)鍌欍€�
1.绛旀: B
銆愯В鏋愩€戯細鐢茬涓€鍔�2鍊嬪柈浣�锛岄倓鍓╀笅48鍊嬪柈浣�銆傛鍚�锛岀敱涔欏厛鍔冿紝姣忔涔欏妰x鍊嬪柈浣嶇殑鏅傚€�锛岀敳灏卞妰(6-x)鍊�(鍗充箼鍔�1鍊�锛岀敳鍔�5鍊�;涔欏妰2鍊嬶紝鐢插妰4鍊�;涔欏妰3鍊�锛岀敳鍔�3鍊�;涔欏妰4鍊�锛岀敳鍔�2鍊�;涔欏妰5鍊嬶紝鐢插妰1鍊�)锛屼繚璀夋瘡杓�“涔欑敳”涓嬩締閮芥槸娓涘皯x+(6-x)=6锛岄偅涔堥€�48鍊嬪柈浣嶇稉(j墨ng)閬�8杓箣鍚庡氨鍔冨畬浜�锛屼笖鏈€鍚庝竴鍊嬪柈浣嶅繀鐒舵槸鐢插妰瀹氱殑锛屽洜姝ょ敳蹇呯劧鐛插嫕锛屾晠绛旀鐐築銆�
2.绛旀: A
銆愯В鏋愩€戯細鍒嗘垚鍏╁€嬮瀛愪締鑰冩叜锛氶粸鏁�(sh霉)涔嬪拰鐐哄鏁�(sh霉)鍖呭惈鍏╃ó鎯呮硜锛氱涓€鍊嬮瀛愮偤濂囨暩(sh霉)锛岀浜屽€嬮瀛愮偤鍋舵暩(sh霉);鎴栬€呯涓€鍊嬮瀛愮偤鍋舵暩(sh霉)锛岀浜屽€嬮瀛愮偤濂囨暩(sh霉)銆傝€岄粸鏁�(sh霉)涔嬪拰鐐哄伓鏁�(sh霉)涔熷寘鍚叐绋儏娉侊細濂囨暩(sh霉)+濂囨暩(sh霉)锛屽伓鏁�(sh霉)+鍋舵暩(sh霉)銆傛晠P1=(1/2×1/2)+(1/2×1/2)=1/2锛孭2=(1/2×1/2)+(1/2×1/2)=1/2銆傛晠P1=P2銆傚洜姝�锛屾湰椤岀瓟妗堥伕鎿嘇閬搁爡銆�(鏈涔熷彲鎸夌収姒傜巼鐨勫畾缇╄▓绠椼€�)
3.绛旀: D
銆愯В鏋愩€戯細寰�1鍒�100鑳借5鏁撮櫎鐨勬暩(sh霉)鏈�5銆�10銆�15銆�20……95銆�100锛屽叡20鍊嬫暩(sh霉)锛屾垚绛夊樊鏁�(sh霉)鍒�锛屽洜姝ら€�20鍊嬫暩(sh霉)瀛楃殑鍜岀偤(5+100)÷2×20=105×10=1050锛屾晠姝ｇ⒑绛旀鐐篋銆�
4.绛旀: D
銆愯В鏋愩€戯細鏍规摎(j霉)閬搁爡锛岄噰鐢ㄤ唬鍏ユ帓闄ゆ硶锛屽緸鏈€澶х殑閬搁爡闁嬪椹楄瓑锛岃嫢铔嬬硶鍍规牸鐐�8鍏�锛屽墖鍓╀笅鐨勭附鍜岀偤58-40=18锛岃ō(sh猫)铇嬫灉鐨勫児鏍肩偤a鍏�銆侀钑夌偤b鍏�銆侀潰鍖呯偤c鍏�锛屽墖2a+3b+4c=18锛岃В寰梐=4銆乥=2銆乧=1鏅�锛岀鍚堥鎰忥紝閬窪銆�
5.绛旀: D
銆愯В鏋愩€戯細鍋囧畾姣忓€嬮嫾鐞存暀甯付x鍊嬪(xu茅)鐢�锛屾瘡鍊嬫媺涓佽垶鏁欏斧甯秠鍊嬪(xu茅)鐢�锛屽墖鏍规摎(j霉)椤屾剰鏈夛細5x+6y=76銆傛牴鎿�(j霉)姝ゆ柟绋�锛屽彲鐭蹇呯偤鍋舵暩(sh霉)锛岃€寈鑸噛鍧囩偤璩�(zh矛)鏁�(sh霉)锛屽洜姝=2锛屼唬鍥炲彲寰梱=11銆備簬鏄湪瀛�(xu茅)鐢熶汉鏁�(sh霉)娓涘皯鍚�锛岄倓鍓╀笅瀛�(xu茅)鍝＄偤4×2+3×11=41鍊�锛屾晠姝ｇ⒑绛旀鐐篋銆�
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