2022骞村叕鍕�(w霉)鍝¤€冭│鑱锋脯姣忔棩涓€绶达細鏁�(sh霉)閲忛棞(gu膩n)绯荤繏(x铆)椤屽強绛旀瑙ｆ瀽(2鏈�9鏃�)
鐎忚
鏀惰棌
2022骞村叕鍕�(w霉)鍝¤€冭│鑱锋脯姣忔棩涓€绶达細鏁�(sh霉)閲忛棞(gu膩n)绯荤繏(x铆)椤屽強绛旀瑙ｆ瀽(2鏈�9鏃�)
渚嬮1
杈﹀叕瀹ゅ伐浣滀汉鍝′娇鐢ㄧ磪銆佽棈(l谩n)鍏╃ó椤忚壊鐨勬枃浠惰瑁�49浠界浉鍚岀殑鏂囦欢銆傛瘡鍊�(g猫)绱呰壊鏂囦欢琚嬪彲浠ヨ14浠芥枃浠�锛屾瘡鍊�(g猫)钘�(l谩n)鑹叉枃浠惰鍙互瑁�3浠芥枃浠�銆傝浣挎瘡鍊�(g猫)鏂囦欢琚嬮兘鎭板ソ瑁濇豢锛岄渶銆佽棈(l谩n)鑹叉枃浠惰鐨勬暩(sh霉)閲忓垎鍒ョ偤( )鍊�(g猫)銆�
A.6 B.4 C.1 D.7
銆愯В鏋愩€�D銆傝ō(sh猫)绱呰壊銆佽棈(l谩n)鑹叉枃浠惰鍒嗗垾鐐簒銆亂鍊�(g猫)锛屾牴鎿�(j霉)椤屾剰“姣忓€�(g猫)鏂囦欢琚嬮兘鎭板ソ瑁濇豢”锛屽墖鏈�14x+3y=49锛岀敱浜巟鍜寉閮芥槸鏂囦欢琚嬬殑鍊�(g猫)鏁�(sh霉)锛屽嵆閮芥槸鏁存暩(sh霉)锛屽張鐭鐨勭郴鏁�(sh霉)7鑸囧父鏁�(sh霉)闋�(xi脿ng)49鏈夋渶澶у叕绱勬暩(sh霉)7锛屽彲鐭�7x鑳借7鏁撮櫎锛�49鑳借7鏁撮櫎锛屾晠4y涔熷繀闋堣兘琚�7鏁撮櫎锛岀郴鏁�(sh霉)4鏃笉鏄�7鐨勫€嶆暩(sh霉)涔熶笉鏄�7鐨勭磩鏁�(sh霉)锛屾墍浠ュ彧鑳芥槸鏈煡鏁�(sh霉)y鑳借7鏁撮櫎銆傛晠姝ら绛旀閬窪銆�
渚嬮2
瓒呭競灏�99鍊�(g猫)铇嬫灉瑁濋€�(j矛n)鍏╃ó鍖呰鐩�锛屽ぇ鍖呰鐩掓瘡鍊�(g猫)瑁�12鍊�(g猫)铇嬫灉锛屽皬鍖呰鐩掓瘡鍊�(g猫)瑁�5鍊�(g猫)铇嬫灉锛屽叡鐢ㄤ簡鍗佸鍊�(g猫)鐩掑瓙鍓涘ソ瑁濆畬銆傚晱鍏╃ó鍖呰鐩掔浉宸灏戝€�(g猫)?
A.3 B.4 C.7 D.13
銆愯В鏋愩€�D銆傝ō(sh猫)澶у皬鍖呰鐩掑垎鍒ョ偤x銆亂鍊�(g猫)锛屾牴鎿�(j霉)椤屾剰锛屽墖鏈�12x+5y=99,涓攛+y>10锛岀敱x鍜寉閮芥槸鍖呰鐩掔殑鍊�(g猫)鏁�(sh霉)锛屽嵆閮芥槸鏁存暩(sh霉)锛屽張鍥�?y脿n)?涔樹互涓€鍊�(g猫)鏁�(sh霉)鐨勫熬鏁�(sh霉)鍙湁0鎴�5锛屽鏋滅偤0锛屽墖12x鐨勫熬鏁�(sh霉)蹇呴爤鏄�9锛岄€欓’鐒朵笉鍙兘銆傚墖5y鐨勫熬鏁�(sh霉)蹇呯劧鏄�5銆�12x鍔犱笂灏炬暩(sh霉)鐐�5鐨勬暩(sh霉)寰楀埌灏炬暩(sh霉)鐐�9鐨勬暩(sh霉)锛屽墖12x鐨勫熬鏁�(sh霉)鍙兘鏄�4锛屾墍浠鍙兘鏄�2鎴�7锛屽彇鍊煎啀澶х殑瑭�锛�12x灏辫秴閬�99浜�銆傜暥(d膩ng)x=2鏅�(sh铆)锛寉=15锛屾鏅�(sh铆)澶у皬鍖呰鐩掔浉宸�13鍊�(g猫)锛屽彲鐩存帴閬告搰D闋�(xi脿ng)銆傞(y脿n)璀夌暥(d膩ng)x=7鏅�(sh铆)锛寉=3锛屼笉婊胯冻x+y>10銆傛晠姝ら绛旀閬窪銆�
渚�3
鏌愰爡(xi脿ng)宸ョ▼锛岀敳宸ョ▼闅�(du矛)鍠崹(d煤)鏂藉伐闇€瑕�30澶╁畬鎴�锛屼箼宸ョ▼闅�(du矛)鍠崹(d煤)鏂藉伐闇€瑕�25澶╁畬鎴愩€傜敳闅�(du矛)鍠崹(d煤)鏂藉伐浜�4澶╁悗锛屾敼鐢卞叐闅�(du矛)涓€璧锋柦宸�锛屾湡闁撶敳闅�(du矛)浼戞伅浜嗚嫢骞插ぉ锛屾渶鍚庢暣鍊�(g猫)宸ョ▼鍏辫€楁檪(sh铆)19澶╁畬鎴愶紝鍟忕敳闅�(du矛)涓€斾紤鎭簡骞惧ぉ?
A.1 B.3 C.5 D.7
銆愮瓟妗堛€�D銆傝В鏋愶細椤岀洰涓嚭鐝�(xi脿n)“鐢插伐绋嬮殜(du矛)鍠崹(d煤)鏂藉伐闇€瑕�30澶╁畬鎴�锛屼箼宸ョ▼闅�(du矛)鍠崹(d煤)鏂藉伐闇€瑕�25澶╁畬鎴�”锛屾湁鍏╁€�(g猫)瀹屾垚宸ヤ綔鐨勬檪(sh铆)闁�锛屽皣宸ヤ綔绺介噺W瑷�(sh猫)鐗瑰€�锛岃ō(sh猫)鐐�30銆�25鐨勬渶灏忓叕鍊嶆暩(sh霉)150锛屽彲浠ユ眰寰楃敳鐨勬晥鐜囩偤5锛屼箼鐨勬晥鐜囩偤6銆傞鐩腑鎻忚堪锛�“鐢查殜(du矛)鍠崹(d煤)鏂藉伐浜�4澶�锛屾渶鍚庢暣鍊�(g猫)宸ョ▼鍏辫€楁檪(sh铆)19澶�”锛屽彲浠ユ帹鍑轰箼宸ヤ綔浜�19-4=15澶�锛岄偅涔堜箼瀹屾垚鐨勫伐浣滈噺鐐�6×15=90锛屽墖鐢插畬鎴愮殑宸ヤ綔閲忕偤150-90=60锛屽畬鎴愪互涓婂伐浣滈噺鐢查渶宸ヤ綔60÷5=12澶╋紝宸茬煡鏁村€�(g猫)宸ョ▼鍏辫€楁檪(sh铆)19澶�锛屽墖鐢蹭紤鎭簡19-12=7澶┿€�
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