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鐎忚
鏀惰棌
2021骞翠笂娴峰叕鍕�(w霉)鍝¤€冭│琛屾脯鏁�(sh霉)瀛�(xu茅)閬嬬畻绶寸繏椤岋紙30锛�
1. 鏌愬晢搴楁悶搴楁叾锛岃臣鐗╂豢200鍏冨彲浠ユ娊鐛庝竴娆�銆備竴鍊嬭涓鏈夋铏熺偤0鍒�9鐨勫崄鍊嬪畬鍏ㄧ浉鍚岀殑鐞�锛屾豢瓒虫娊鐛庢浠剁殑椤у鍦ㄨ涓懜鐞�锛屼竴鍏辨懜鍏╂锛屾瘡娆℃懜鍑轰竴鍊嬬悆(鐞冩斁鍥�)锛屽鏋滅涓€娆℃懜鍑虹悆涓婄殑鏁�(sh霉)瀛楁瘮绗簩娆℃懜鍑虹殑灏�锛屽嵆鍙嵅鐛庯紝鍓囨煇鎶界崕椤у鐛茬崕姒傜巼鏄細
A.5%
B.25%
C.45%
D.85%
2. 鏌愮彮瑷傞柋銆婃帰绱€€嬪拰銆婃櫤鎱с€嬮洔蹇楃殑鎯呮硜鏈夊洓椤�锛屽彧瑷傘€婃帰绱€€嬶紝鍙▊銆婃櫤鎱с€�锛屽叐绋兘瑷�锛屽叐绋兘涓嶈▊銆傝嫢瑷傘€婃帰绱€€嬮洔蹇楃殑鏈�22浜�锛岃▊銆婃櫤鎱с€嬮洔蹇楃殑鏈�30浜�锛屽叐绋兘瑷傜殑浜烘暩(sh霉)鏄叐绋兘娌掕▊鐨勪汉鏁�(sh霉)鐨�6鍊�锛屽凡鐭ヨ┎鐝湁42浜�锛岄偅涔堥€欏€嬬彮鍏╃ó閮芥矑瑷傜殑鏈夊灏戜汉?
A.1
B.2
C.3
D.4
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2.銆愮瓟妗堛€態銆傝В鏋愶細瑷�(sh猫)鍏╃ó閮芥矑瑷傜殑鏈墄浜�锛屽墖鍏╃ó閮借▊鐨勬湁6x浜�锛屾牴鎿�(j霉)瀹规枼鍘熺悊锛屾湁22+30-6x+x=42锛岃В寰梮=2锛屾晠閫欏€嬬彮鍏╃ó閮芥矑瑷傜殑鏈�2浜�銆�
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