浜嬫キ(y猫)鍠綅鑰冭│鑱锋脯(c猫)姣忔棩涓€绶�

1銆佹煇瀛�(xu茅)鏍¤垑琛屼竴娆℃暩(sh霉)瀛�(xu茅)绔�(j矛ng)璩斤紝鍏辨湁鑻ュ共鍚嶅悓瀛�(xu茅)寰楃崕(ji菐ng)锛屽叾涓緱涓€绛夌崕(ji菐ng)鐨勫悓瀛�(xu茅)姣斾綑涓嬬殑寰楃崕(ji菐ng)浜烘暩(sh霉)鐨勪簲鍒嗕箣涓€灏戜笁鍚嶏紝寰椾簩绛夌崕(ji菐ng)鐨勫崰闋�(l菒ng)鐛�(ji菐ng)浜烘暩(sh霉)鐨勪笁鍒嗕箣涓€锛屽緱涓夌瓑鐛�(ji菐ng)鐨勪汉鏁�(sh霉)姣斾簩绛夌崕(ji菐ng)鐨勪汉鏁�(sh霉)澶�21鍚�锛屽晱(w猫n)寰楃崕(ji菐ng)浜烘暩(sh霉)鏄灏戝悕?

A.111

B.101

C.84

D.96

2銆佸皠绠亱(y霉n)鍕�(d貌ng)鍝￠€�(j矛n)琛岃〒(x霉n)绶达紝10鏀鍏辨墦浜�93鐠�(hu谩n)锛屼笖姣忔敮绠殑鐠�(hu谩n)鏁�(sh霉)閮戒笉浣庝簬8鐠�(hu谩n)銆傚晱(w猫n)鍛戒腑10鐠�(hu谩n)鐨勭鏁�(sh霉)鏈€澶氳兘姣斿懡涓�9鐠�(hu谩n)鐨勫骞炬敮?

A.2

B.3

C.4

D.5

3銆佹湁涓€鍊�(g猫)闆诲瓙閻�锛屾瘡鍒版暣榛�(di菐n)闊夸竴娆￠埓锛屾瘡璧�9鍒嗛悩浜竴娆＄噲銆備腑鍗�12榛�(di菐n)鏁存檪(sh铆)锛岄浕瀛愰悩鏃㈤熆閳村張浜噲銆傛眰涓嬩竴娆℃棦闊块埓鍙堜寒鐕堟槸涓嬪崍骞鹃粸(di菐n)閻�?

A.2

B.3

C.5

D.7

婧Θ鎻愮ず锛氱瓟妗堣(ji脿n)涓嬮爜(y猫)

鍙冭€冪瓟妗堝強瑙ｆ瀽

1銆併€愮瓟妗堛€慉

瑙ｆ瀽锛氭柟娉曚竴锛岃ō(sh猫)寰椾簩绛夌崕(ji菐ng)鏈墄浜�锛屽墖闋�(l菒ng)鐛�(ji菐ng)绺�?c猫)钘�?sh霉)鐐�3x锛屼笁绛夌崕(ji菐ng)鏈墄+21浜猴紝涓€绛夌崕(ji菐ng)鏈�(x+x+21)×1/5-3浜�锛岀敱椤屾剰鍙煡锛�3x=(x+x+21)×1/5-3+x+x+21锛屽緱3x=111銆�

鏂规硶浜�锛岀敱“寰椾竴绛夌崕(ji菐ng)鐨勫悓瀛�(xu茅)姣斾綑涓嬪緱鐛�(ji菐ng)浜烘暩(sh霉)鐨勪簲鍒嗕箣涓€灏戜笁鍚�”鍙煡锛屽緱鐛�(ji菐ng)浜烘暩(sh霉)鍔�3鏄�6鐨勬暣鏁�(sh霉)鍊�锛岄伕闋�(xi脿ng)涓彧鏈堿闋�(xi脿ng)婊�(m菐n)瓒抽鎰忋€�

2銆併€愮瓟妗堛€慏

瑙ｆ瀽锛氬彲浠ユ妸鎵€鏈夌殑鐠�(hu谩n)鏁�(sh霉)鐪嬫垚8鐠�(hu谩n)锛屽墖鏈�80鐠�(hu谩n)銆傝ō(sh猫)10鐠�(hu谩n)鐨勭鏁�(sh霉)鐐簒锛�9鐠�(hu谩n)鐨勭鏁�(sh霉)鐐簓锛屽墖鍒╃敤鐩堜綑铏ц(b菙)鎬濇兂寰楀埌鏂圭▼2x+y=13锛屾牴鎿�(j霉)鏁�(sh霉)鐨勫鍋舵€х煡y鐐哄鏁�(sh霉)锛屼笖鐢遍鎰忕煡x瑕佺洝鍙兘澶�锛岄偅涔坹灏辫鐩″彲鑳藉皬涓旂偤濂囨暩(sh霉)锛岃В寰梮=6锛寉=1锛屽墖x-y=5銆�

3銆併€愮瓟妗堛€態

瑙ｆ瀽锛氭瘡鍒版暣榛�(di菐n)闊夸竴娆￠埓锛屽氨鏄瘡60鍒嗛悩闊夸竴娆￠埓銆傛眰闁撻殧澶氶暦(zh菐ng)鏅�(sh铆)闁撳悗锛岄浕瀛愰悩鏃㈤熆閳村張浜噲锛屽氨鏄眰60鑸�9鐨勬渶灏忓叕鍊嶆暩(sh霉)銆�60鑸�9鐨勬渶灏忓叕鍊嶆暩(sh霉)鏄�180銆�180÷60=3灏忔檪(sh铆)锛岀敱浜庢槸涓崍12榛�(di菐n)鏅�(sh铆)鏃㈤熆閳村張浜噲锛屾墍浠ヤ笅涓€娆℃棦闊块埓鍙堜寒鐕堟槸涓嬪崍3榛�(di菐n)閻�銆�

鏇村浜嬫キ(y猫)鍠綅鐩搁棞(gu膩n)璩囪▕璜�(q菒ng)绻肩簩(x霉)闂�(gu膩n)娉ㄧ挵(hu谩n)鐞冪恫(w菐ng)鏍′簨妤�(y猫)鍠綅鑰冭│闋婚亾銆傞粸(di菐n)鎿婁笅鏂�鍏嶈不(f猫i)涓嬭級鎸夐垥锛屽嵆鍙嵅寰椾簨妤�(y猫)鍠綅鎷涜仒鑰冭│鐩搁棞(gu膩n)鍌欒€冭硣鏂�銆傛柊骞存柊姘ｈ薄锛�2020骞村悇鐪佷簨妤�(y猫)鍠綅绲�(t菕ng)鑰冨畨鎺掍篃鍙互鎻愪笂鏃ョ▼鍟�!!!鐐哄強鏅�(sh铆)鐛插緱2020骞村悇浣嶈€冪敓鎵€鍦ㄧ渷浠戒簨妤�(y猫)鍠綅绲�(t菕ng)鑰冨牨(b脿o)鍚嶆檪(sh铆)闁�銆佹簴(zh菙n)鑰冭瓑鎵撳嵃鏅�(sh铆)闁撶瓑鑰冭│绡€(ji茅)榛�(di菐n)淇℃伅锛屾帹钖﹀悇浣嶈€冪敓浣跨敤鐠�(hu谩n)鐞冪恫(w菐ng)鏍� 鍏嶈不(f猫i)闋�(y霉)绱勭煭淇℃彁閱�鏈嶅嫏(w霉)锛岄爯(y霉)绱勬垚鍔熷彲鐩℃棭鐛插緱閫氱煡鍝�銆�