鏁�(sh霉)閲忛棞(gu膩n)绯�

1.鏌愪紒妤�(y猫)鏈夊叐绋€ц唱(zh矛)鐨勫摗宸�锛屾寮忓摗宸ヨ垏鍕炲嫏(w霉)娲鹃仯鍚堝悓宸ャ€傛寮忓摗宸ヤ韩鏈夌浉鐣�(d膩ng)浜庡熀鏈伐璩�30%鐨勭妇鏁堝伐璩�锛屽嫗鍕�(w霉)娲鹃仯鍚堝悓宸ョ殑鍩烘湰宸ヨ硣鑸囨寮忓摗宸ョ浉鍚屼絾娌掓湁绺炬晥宸ヨ硣锛屼笖缂哄皯鐩哥暥(d膩ng)浜庡熀鏈伐璩�12%鐨勪綇鎴垮叕绌嶉噾銆傝嫢瑭蹭紒妤�(y猫)姝ｅ紡鍝″伐鑸囧嫗鍕�(w霉)娲鹃仯鍚堝悓宸ョ殑姣斾緥鐐�2鈭�3锛岀偤瀵︾従(xi脿n)鍚屽伐鍚岄叕涓斾繚璀夋寮忓摗宸ュ緟閬囦笉璁�锛岃┎浼佹キ(y猫)鐨勮柂閰敮鍑哄皣澧炲姞澶氬皯?

A.13.4%

B.16%

C.20%

D.21%

2.鏌愬蹇冩柟闄ｆ渶澶栧堡鍜屾澶栧堡瀛�(xu茅)鐢熷垎鍒ョ祫鎴愬叐鍊嬪伐浣滃皬绲�锛屽垎鍒ュ幓瀹屾垚宸ヤ綔閲忕浉绛夌殑A銆丅鍏╅爡宸ョ▼锛岄枊宸�8澶╁悗锛孉宸ョ▼瀹屽伐锛岀劧鍚庡叐鍊嬪皬绲勫悎骞讹紝鍙堢敤浜嗕竴澶�锛屽墰濂藉畬鎴愪簡B宸ョ▼銆傚亣瑷�(sh猫)姣忓€嬪(xu茅)鐢熺殑宸ヤ綔鏁堢巼鐩哥瓑锛岃嫢鍙畨鎺掑叾浣欏(xu茅)鐢熷幓瀹屾垚鑸嘇銆丅绺藉伐浣滈噺鐩哥瓑鐨凜宸ョ▼锛岄渶瑕佸灏戝ぉ?

A.16

B.25

C.36

D.48

3.鎶�1鍒�31鐨勯€ｇ簩(x霉)鏁存暩(sh霉)鍒嗘垚A銆丅鍏╃祫锛屼笖10鍦ˋ绲�锛屽鏋滄妸10寰濧绲勭Щ鍒癇绲勪腑锛屽墖A绲勪腑鍚勬暩(sh霉)鐨勫钩鍧囨暩(sh霉)澧炲姞1/2锛孊绲勪腑鍚勬暩(sh霉)鐨勫钩鍧囨暩(sh霉)涔熷鍔�1/2锛屽晱A绲勪腑鍘熸湁澶氬皯鍊嬫暩(sh霉)?

A.9

B.10

C.21

D.22

婧Θ鎻愮ず锛氱瓟妗堝強瑙ｆ瀽瑕嬩笅闋�

鍙冭€冪瓟妗堝強瑙ｆ瀽

1.銆愮瓟妗堛€慏

瑙ｆ瀽锛氳ō(sh猫)鍩烘湰宸ヨ硣鐐�1锛屽墖姝ｅ紡鍝″伐姣忎汉鐨勮柂閰敮鍑虹偤1+30%×1+12%×1=1.42銆傝ō(sh猫)鍝″伐绺芥暩(sh霉)鐐�5锛屽墖瀵︾従(xi脿n)鍚屽伐鍚岄叕鍓嶇殑钖叕鏀嚭鐐�1.42×2+1×3=5.84銆傚鐝�(xi脿n)鍚屽伐鍚岄叕鍚庤柂閰敮鍑虹偤1.42×5=7.1锛屽鍔�7.1÷5.84-1=1.26÷5.84>20%锛岄伕D銆�

2.銆愮瓟妗堛€慉

瑙ｆ瀽锛氭牴鎿�(j霉)“鏂归櫍鐩搁劙鍏╁堡浜烘暩(sh霉)鐩稿樊鐐�8”锛岃ō(sh猫)鏂归櫍鏈€澶栧堡浜烘暩(sh霉)鐐簒锛屽墖娆″灞や汉鏁�(sh霉)鐐簒-8銆傝ō(sh猫)姣忓€嬪(xu茅)鐢熶竴澶╃殑宸ヤ綔閲忕偤1锛屼緷椤屾剰鏈�8x=8(x-8)+x+x-8锛岃В寰梮=36銆傛柟闄ｅ悇灞や汉鏁�(sh霉)渚濇鏄�36銆�28銆�20銆�12銆�4锛岄櫎鏈€澶栧堡鍜屾澶栧堡閭勬湁瀛�(xu茅)鐢�20+12+4=36浜猴紝浜烘暩(sh霉)鑸囨柟闄ｆ渶澶栧堡浜烘暩(sh霉)鐩稿悓銆侰宸ョ▼鐨勫伐浣滈噺鏄疉宸ョ▼宸ヤ綔閲忕殑2鍊�锛屽墖瀹屾垚C宸ョ▼闇€瑕�8×2=16澶�銆�

3.銆愮瓟妗堛€慏

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