甘肃省兰州市2021-2022学年中考数学模拟试卷（二模）含解析版

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11C.ᐜÔѲÕᜧD.ᐜÕᜧ²-ÒூNᫀ௃Aூ᪆௃ÖCD_L48WZ8pX஺,nlkᑣ×Ḅᡝ—,2'AC=BC,'.AD-BD,••S&AC/SdBCD1.%S^ABC=2SA/ICD=2X—=k.2.♦.2ABCḄ☢Ð-Ò.ᦑ⌱A.X8⚪E⌕ᳮ¬Íᵨ@ᦪÙḄÚÛÜ×.10.ÝÞᔆàᨴâãÌäå50æbçèãÌäå196æ.éêᔆëஹìᨴâ}ᙳîᨴḄÕv᳛wx,xïðḄMA.50(1+x2)=196B.50+50(1+x2)=196C.50+50(1+x)+50(1+x)2=196D.50+50(1+x)+50(l+2x)=196ூNᫀ௃Cூ᪆௃ூ௃Q⚪ᑖ᪆8ñòÕv²Ḅó=ÕvôḄóx(1+Õv᳛)᝞êᔆëஹìᨴâ}ᙳîb12⚓/e30⚓

12ᨴḄÕv᳛wx,õᵨxᑖ⊤öëஹìᨴâḄÌó8ëஹìᨴâḄÌóᑖw50(1+x)ஹ50(1+x)2,÷ø᪷⚪Ü¿850+50(1+x)+50(1+x)2=196.ᦑ⌱C.11.᝞JhmN2C஺Ḅtvw2,BE=CE,MN=l,UùMMḄúXᙠCDஹX஺[ûÎDM
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ZDAB=ZDCB=90°,•.ZC$k.NC4B=N4CB=45°,'AC=AE,:.NACE=615°,.ZBCE=ZACE-ZACB=22.5°,-16⚓/030⚓

16ᦑᫀ422.5°.ூ3௃⚪ὃ8Ḅឋ;GῪḄឋ;Ḅᑁc?ᳮ⍝àáẠḄ⚪ã.18.᝞`ᵯåPᙠfᩚABḄ¤ABᙠåᐝ¬ḄèéCD,AB஻CD,AB=1.5m,CD=4.5m,PᑮCDḄXu2.7m,ᑣABCDëḄXum.ூᫀ௃1.8ூ᪆௃ூ௃ᵫAB஻CD,'PABS^PCD,CDᑮABXux,᪷!"Ḅឋ;AB2.7—x22.7—x„'---=-------,ᓽ=-------,'x=1.8m.CD2.762.7ᡠABuᙢ☢ḄXu1.8m,ᦑᫀL8.19.᝞`ᡠ°Ḅì®íUr«¤Ḅíîïð¬Ḅíîï.ᑣñߟஹ.\ó“ுூᫀ௃ö.ூ᪆௃ூ௃^⚪ᑖ᪆4᝞`ᑖ÷ᙠì®í¤ᔜ⌱e¦ùeḄᙊúᯠ.ðö.ᦑᫀö.-17⚓/030⚓

17ὃ4ü?ᙊḄᩩþ.20.᝞`ABCDEFGHr"ÿA(0,5),D(0,3),E(0,1),5ூ᪆௃ூ௃ᵫB(-2,5),C(-2,3),F(3,1),;BஹEஹ4ᦑ8yḄᜐ,8Ḅ᪆y=kx+b,-2k+b=5ᑣ3%+6=1#$5",17D=----5%18⚓/(30⚓

18417-8ᔆḄ᪆,17ᑣ012,17••40,—678CஹEDஹᦑCE஺Ḅᜐ,CEḄ᪆y=ax^c9-CEḄ᪆y=~x^\,஺Ḅ᪆y=dx+ef[3d+e=l4=31\d=--|3,e=32஺Ḅ᪆AA/3,3y=-x+12஺Gx+3x=-6:y=7...4A6,76717ᦑKᫀ40,—6,4A6,76.5NOPQR⌕TUOVWḄXḄᓽ7UZ⌕[\ᑖ^_`.aஹbc⚪%19⚓/(30⚓

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