2020骞撮櫆瑗垮叕鍕�(w霉)鍝¤€冭│鏁�(sh霉)閲忛棞(gu膩n)绯荤反缈�(x铆)(3鏈�20鏃�)
鐎忚
鏀惰棌
2020骞撮櫆瑗垮叕鍕�(w霉)鍝¤€冭│鏁�(sh霉)閲忛棞(gu膩n)绯荤反缈�(x铆)锛�
1.鏈変竴鍊�(g猫)鐏屾簤鐢ㄧ殑涓綁(zhu菐n)姘存睜锛屼竴鐩撮枊钁楅€�(j矛n)姘寸寰€閲岀亴姘达紝涓€娈垫檪(sh铆)闁撳悗锛岀敤2鑷烘娊姘存(j墨)鎺掓按锛屽墖鐢�40鍒嗛悩鑳芥帓瀹�;濡傛灉鐢�4鑷哄悓妯ｇ殑鎶芥按姗�(j墨)鎺掓按锛屽墖鐢�16鍒嗛悩鎺掑畬銆傚晱濡傛灉瑷�(j矛)鍔冪敤10鍒嗛悩灏囨按鎺掑畬锛岄渶瑕佸灏戣嚭鎶芥按姗�(j墨)?( )
A.5鑷�
B.6鑷�
C.7鑷�
D.8鑷�
2.鏂囧叿搴楃殑鍦撶彔绛嗘瘡鏀�4鍏�锛岀敖瀛楃瓎姣忔敮6鍏冿紝閶肩瓎姣忔敮7鍏�銆傜敳銆佷箼銆佷笝涓変汉甯剁殑閷㈡暩(sh霉)鐩哥瓑涓斾笉閮戒笉瓒呴亷100鍏�锛屼笁浜哄垎鍒ヨ臣璨蜂竴绋瓎銆傚凡鐭ョ敳璨峰畬鍦撶彔绛嗗悗閭勫墿15鍏�锛屼箼璨峰畬绨藉瓧绛嗗悗閭勫墿21鍏�锛屼笝璨峰畬閶肩瓎鍚庨倓鍓�17鍏�銆傚鏋滀笁浜虹殑閷㈢浉鍔�锛屾渶澶氳兘璨峰灏戞敮绛�?( )
A.60
B.65
C.72
D.87
3.鏈�20浣嶉亱(y霉n)鍕曞摗鍙冨姞闀疯窇锛屼粬鍊戠殑鍙冭辰铏熺⒓鍒嗗垾鏄�1锛�2锛�3锛�……锛�20锛岃嚦灏戣寰炰腑閬稿嚭澶氬皯鍊�(g猫)鍙冭辰铏熺⒓锛屾墠鑳戒繚璀夎嚦灏戞湁鍏╁€�(g猫)铏熺⒓鐨勫樊鏄�13鐨勫€嶆暩(sh霉)?
A.12
B.15
C.14
D.13
4.904鑸�584鐨勫樊闄や互20鐨�1/7锛屽晢鏄灏�?( )
A.112
B.113
C.114
D.115
5.鍟嗗簵閵峰敭鏌愮ó鍟嗗搧锛屽湪鍞嚭绺介€�(j矛n)璨ㄦ暩(sh霉)鐨勪竴鍗婂悗灏囧墿浣欑殑鎵撳叓鎶樺嚭鍞�锛岄姺鍞帀鍓╀綑鐨勪竴鍗婂悗鍦ㄧ従(xi脿n)鍍�(ji脿)鍩虹(ch菙)涓婃墦浜旀姌鍑哄敭锛屽叏閮ㄥ敭鍑哄悗瑷�(j矛)绠楁瘺鍒╂饯鐐洪噰璩兼垚鏈殑60%銆傚晱濡傛灉涓嶆墦鎶樺嚭鍞墍鏈夌殑鍟嗗搧锛屾瘺鍒╂饯鐐洪噰璩兼垚鏈殑澶氬皯?( )
A.45%
B.60%
C.90%
D.100%
涓嬮潰鐐�2020骞撮櫆瑗垮叕鍕�(w霉)鍝¤€冭│鏁�(sh霉)閲忛棞(gu膩n)绯荤反缈�(x铆)鍙冭€冪瓟妗堬細
1.绛旀: B
銆愯В鏋愩€戯細瑷�(sh猫)姣忓垎閻樻祦鍏ョ殑姘撮噺鐩哥暥(d膩ng)浜巑鑷烘帓姘存(j墨)鐨勬帓姘撮噺锛屾帓姘村叡闇€瑕乶鑷�锛屾湁鎭掔瓑寮忓涓嬶細
(2-m)×40=(4-m)×16=(n-m)×10锛岃В寰梞=2/3锛宯=6锛屾晠姝ｇ⒑绛旀鐐築銆�
2.绛旀: B
銆愯В鏋愩€戯細鏍规摎(j霉)椤岀洰鍙煡鐢�銆佷箼銆佷笝甯剁殑閷㈡暩(sh霉)鍒嗗垾闇€婊胯冻闄や互4浣�3锛岄櫎浠�,6浣�3浠ュ強闄や互7浣�3锛屾牴鎿�(j霉)浣欐暩(sh霉)鐨勪綑鍚屽姞浣欏彛瑷�锛屼笁鍊�(g猫)浜哄付鐨勯將鏁�(sh霉)鐐�87鍏�锛屾晠3浜洪將鏁�(sh霉)鐩稿姞鐐�261鍏冦€傝鎯宠卜鐨勭瓎鏈€澶氬氨璨锋渶渚垮疁鐨�4鍏冧竴鏀殑鍦撶彔绛�锛屾渶澶氬彲浠ヨ卜65鏀€�
3.绛旀: C
銆愯В鏋愩€戯細杞�(zhu菐n)璁婃€濈董锛岃€冩叜鎵嬩腑鏈�20鍊�(g猫)铏熺⒓锛岀洝閲忎娇寰楄櫉纰肩殑宸€间笉鏄�13鐨勫€嶆暩(sh霉)锛屼緷娆＄櫦(f膩)鍑哄悇鍊�(g猫)铏熺⒓锛屾鏅�(sh铆)椤劧鏄櫦(f膩)鍑�1銆�2銆�3銆�4銆�……銆�13锛屽凡缍�(j墨ng)鐧�(f膩)鍑�13鍊�(g猫)铏熺⒓锛屽皻鏈豢瓒宠姹�锛屾帴涓嬩締鍐嶇櫦(f膩)鍑轰换浣曚竴鍊�(g猫)铏熺⒓閮芥渻婊胯冻瑕佹眰锛屾晠鏈€澶氬彲浠ョ櫦(f膩)鍑�14鍊�(g猫)铏熺⒓锛屾晠姝ｇ⒑绛旀鐐篊銆�
4.绛旀: A
銆愯В鏋愩€戯細鏍规摎(j霉)椤屾剰鍒楀嚭绠楀紡锛�(904-584)÷(20×1/7)=320÷20×7=16×7=112锛岀瓟妗堢偤A銆�
5.绛旀锛欴
銆愯В鏋愩€戯細瑙ｆ瀽1锛�
瑷�(sh猫)鍘熷敭鍍�(ji脿)鐐篜锛屾垚鏈偤C锛屽墖鏈夛細(1/2×P+1/4×P×0.8+1/4×P×0.8×0.5)÷C=1+60%锛屽墖0.8P/C=1.6锛孭/C=2锛孭/C-1=100%锛屾晠姝ｇ⒑绛旀鐐篋銆�
瑙ｆ瀽2锛�
鍋囪ō(sh猫)瑭插晢鍝佺殑鍞児(ji脿)鍜岄€�(j矛n)璨ㄩ噺閮界偤1锛屾牴鎿�(j霉)椤屾剰寰楀埌閵峰敭椤嶇偤1×1/2+(1×80%)×(1/2×1/2)+(1×80%×50%)×(1/2×1/2)=0.8銆傜敱浜庢瘺鍒╂饯鐐洪噰璩兼垚鏈殑60%锛屾晠閲囪臣鎴愭湰鐐�0.8÷(1+60%)=0.5銆傚鏋滀笉鎵撴姌鍑哄敭鎵€鏈夊晢鍝�锛屽墖姣涘埄娼ゆ槸閲囪臣鎴愭湰鐨�(1×1-0.5)÷0.5=100%銆傛晠姝ｇ⒑绛旀鐐篋銆�
浠ヤ笂鍏�(n猫i)瀹规槸2020骞撮櫆瑗垮叕鍕�(w霉)鍝¤€冭│鏁�(sh霉)閲忛棞(gu膩n)绯荤反缈�(x铆)(3鏈�20鏃�)銆傚笇鏈涘皪鑰冪敓鏈夋墍骞姪銆傛湁鎰忔効鍫�(b脿o)鑰冮櫆瑗垮叕鍕�(w霉)鍝¤€冭│鐨勮€冪敓瑕佹姄绶婃檪(sh铆)闁撳京(f霉)缈�(x铆)鍌欒€�銆�2020闄滆タ鍏嫏(w霉)鍝¤€冭│鍏憡鏆湭鍏竷锛岀偤浜嗛伩鍏嶉尟(cu貌)閬庡牨(b脿o)鍚�锛岃€冪敓鍙互 鍏嶈不(f猫i)闋�(y霉)绱勭煭淇℃彁閱�锛屽強鏅�(sh铆)鐛插彇鍫�(b脿o)鍚嶆檪(sh铆)闁�銆傞倓鍙互榛�(di菐n)鎿婁笅鏂�鍏嶈不(f猫i)涓嬭級鏇村鑰冭│璩囨枡鍝�!
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