2020骞存禉姹熷叕鍕欏摗琛屾脯鏁�(sh霉)閲忛棞绯绘瘡鏃ヤ竴绶�(7鏈�10鏃�)
鐎忚
鏀惰棌
2020骞存禉姹熷叕鍕欏摗琛屾脯鏁�(sh霉)閲忛棞绯绘瘡鏃ヤ竴绶�(7鏈�10鏃�)
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A.4 B.6 C.10 D.18
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A.0 B.2 C.4 D.6
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A.24 B.26 C.28 D.30
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1.B
2.銆愯В鏋愩€慉銆傚皣宸ヤ綔绺介噺瑷偤鏅傞枔36銆�30銆�32鐨勬渶灏忓叕鍊嶆暩(sh霉)锛屽嵆1440锛屽墖鐢查殜鏁堢巼鐐�1440÷36=40锛屼箼闅婃晥鐜囩偤1440÷30=48锛屼笝闅婃晥鐜囩偤1440÷32=45銆傛寜鐓ч鐩爢搴忔寜澶╄吉杞�锛屾瘡3澶╃偤涓€鍊嬪懆鏈�锛屾瘡鍊嬪懆鏈熶腑鐢插伐浣�2澶�锛屼笁闅婂叡鍙互瀹屾垚1×(40+48)+1×(48+45)+1×(40+45)=266锛�1440÷266=5浣�110锛�锛屽嵆鐢ㄤ簡5鍊嬪懆鏈�(15澶�)锛岄倓鍓�110浠藉伐浣滈噺銆傜16澶╃偤鐢蹭箼鍚堜綔锛屽畬鎴愬伐浣滈噺鐐�1×(40+48)=88锛�16澶╃祼鏉熷悗宸ヤ綔閲忛倓鍓╀笅110-88=22锛屽墖绗�17澶╃偤涔欎笝鍚堜綔锛屽氨鍙互瀹屾垚鍏ㄩ儴宸ヤ綔閲�銆傚墖鐢查殜宸ヤ綔鐨勬檪闁撶偤5×2+1=11澶�銆傛晠姝ｇ⒑绛旀鐐篈闋�銆�
3.銆愯В鏋愩€態銆傚亣瑷兘瑁�12鍊嬭構鏋滃拰18鍊嬭構鏋滅殑绱欑鏁�(sh霉)閲忓垎鍒ョ偤a鑸嘼锛岄渶瑕佽鍏呯殑铇嬫灉鏁�(sh霉)鏄痻锛屽墖鏂圭▼鍙〃绀虹偤12a+18b=256+x銆傚洜12鍜�18閮芥槸6鐨勫€嶆暩(sh霉)锛屽墖256+x鏄�6鐨勫€嶆暩(sh霉)銆備唬鍏ラ伕闋呴€茶椹楄瓑銆�
A闋咃紝256+0=256锛屼笉鏄�6鐨勫€嶆暩(sh霉)锛屾帓闄�銆�
B闋�锛�256+2=258锛屾槸6鐨勫€嶆暩(sh霉)锛屽寲绨″緱2a+3b=43锛屾牴鎿�(j霉)濂囧伓鐗规€�锛�43鏄鏁�(sh霉)銆�2a鏄伓鏁�(sh霉)锛屽墖3b鏄鏁�(sh霉)锛屽彲寰梑鏄鏁�(sh霉)銆傝嫢b绛変簬1锛屽墖a=20锛岀瓑寮忔垚绔�锛屾纰恒€傚洜椤岀洰鍟忕殑鏄渶灏�锛屽洜姝ゅ叾浣欑瓟妗堜笉鐢ㄩ璀�銆�
鏁呮纰虹瓟妗堢偤B闋呫€�
4.銆愯В鏋愩€慍銆傜敱椤屾剰鍙緱锛岀敳≥涔�≥涓�≥涓侊紝涓旀枃绔犵附鏁�(sh霉)鐐�28锛屽墖鐢�≥28÷4锛屽嵆鐢�≥7锛屽張鍥犵敳涓嶅埌10绡囷紝鍙緱7≤鐢�≤9锛屾墍浠ョ敳鐨勬暩(sh霉)閲忓彧鑳藉彇鍊�7銆�8銆�9銆傝€屼竵≤涓�≤涔�≤鐢诧紝鍓囦竵≤28÷4锛屽嵆涓�≤7锛屽張鍥犵偤涓佹槸濂囨暩(sh霉)锛屾墍浠ヤ竵鐨勬暩(sh霉)閲忓彧鑳藉彇鍊�1銆�3銆�5銆�7銆�
鍏辨湁8绋彲鑳芥€с€傛晠姝ｇ⒑绛旀鐐篊闋�銆�
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B闋�锛屽皣y=26浠ｅ叆鏂圭▼鍚庯紝x=9锛屾鏅傚師瑷堝妰浜烘暩(sh霉)鐐�锛屾豢瓒冲師瑷堝妰绲勭箶200澶氬悕鏁欏斧锛屾纰�銆�
C銆丏闋�锛屽皣y=28锛寉=30浠ｅ叆鏂圭▼鍚�锛寈瑙ｄ笉鍑烘暣鏁�(sh霉)锛屾帓闄�銆�
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