2013年中招模擬考試試題答案

1、2013 年中招模擬考試試題(一)1.B 2.C 3.D 4.C 5.A 6.A 7.B 8.B9. x1 10.y5(x2)23 11.15 12. 13. 20 14. 15.16. 解：原式······················· 5 分a不能取1，-1,0當(dāng)a1時， ·······&#

2、183;········································· 7分原式·······

3、83;················································ 8 分17.(1

4、)證明：在梯形ABCD 中，ADBC，ABCD，ABEBAD，BADCDA，ABECDA在 ABE 和 CDA 中，ABECDA····································· 5 分(2) 解：由(1)

5、得 ABECDA， AEAC. AECACE.ADBC，DAC40°，ACEDAC40°.EAC180°40°40°100° ··································

6、83;················· 9 分18. 解：(1) 牛奶總產(chǎn)量120÷50%240 萬噸，酸牛奶產(chǎn)量2404012080 萬噸，補充圖略. ······················

7、··················································

8、· 3 分 (2) 鐵鋅牛奶在圖(2)中所對應(yīng)的圓心角度數(shù)為：60°······· 6 分(3) 2013 年純牛奶的生產(chǎn)量為：120×(120%)2172.8 萬噸 ·········· 9 分19. 解：(1) 雙曲線 y，經(jīng)過點A(1，2)，k22雙曲線的解析式為：y··········

9、83;············································ 2 分點B(m，1)在雙曲線y上，m2，則B(2，1) 

10、3;····· 3 分由點A(1，2)，B(2，1)在直線yk1xb 上，得 解得k11，b1直線的解析式為：yx1 ····································

11、··················· 5 分(2)y2>y1>y3 ···························&#

12、183;·················································&#

13、183; 7 分(3)x2 或0x1. ··············································

14、3;···················· 9 分21. 解：(1)設(shè)搭配A種造型x個，則搭配B種造型(60x)個由題意，得 ······················

15、3;························ 3 分解之得 37x40 ·······················&#

16、183;··········································· 5 分x 為正整數(shù)，x137，x238，x339，x440符合題意的搭配方

17、案有4 種：A 種造型37 個，B 種造型23 個；A 種造型38 個，B 種造型22 個；A 種造型39 個，B 種造型21 個；A 種造型40 個，B 種造型20 個 ···· 7 分(2)設(shè)搭配A 種造型x 個時，總成本為W 元，則W1000x1500(60x)500x90000500-0， W隨 x的增大而減小，當(dāng) x40時，W 最小70000元即選用A 種造型40 個，B 種造型20 個時，成本最低為70000 元 ········ 10 分(第2 問中用計算方法或

18、其他方法也可以)22. 解：(1) (2，)， ··············································

19、·············· 4 分(2) 當(dāng)0 t 4時，AOC60°，a1，OPOQ 過點Q作QDx軸于點D (如圖 1)，則QD S OP·QD ········ 4 分當(dāng)4t8時，作QE x軸于點 E(如圖 2)，則QE S DP·QE 綜上，當(dāng)t8 時，S 的值最大，最大值為 ·····&

20、#183;··················8 分23.解：(1) yx3- 3分(2) 點C 的坐標(biāo)為(，0 ) ················································ 5 分設(shè)點A 關(guān)于x 的對稱點為A' (3，3)，連接A'C交直線x于點P，根據(jù)軸