九年级信息A答.doc

2011AABCBAAACBC CBBBA16-20CACBC 21-25ACBAB 26-30BCBCA 31-35GDBFC36-40 BCABC 41-45CAABB 46-50 CBABB51-55BCCCC 56-60BCBAC 61-65ABABC66September 67Art Festival 68November 69 Dance Party 70.25th71. It encourages personal thought.72. Group goals. 73. In many ways these differences come from different educational ideas.74 The teacher speaks, and the students listen. 75. No ,they are different.76were 77.likely 78.Whose 79.Others 80 gone 81 asked 82.his 83 thankful 84.something 85friendship15 802011A1.D 2.C 3. 4 5./6.7.D 8.(1);()()(2)()9;10.11.12. 13. 14. 15.16.17.18.19.2008 20.212223 2011ADBCBD BBDCC 11.1 Fe2O3 +6HCl = 2FeCl3 + 3H2O 2 C + 2CuO 2Cu + CO2 H2 + CuO Cu + H2O () 32KClO3 2KCl + 3O2 Mg + 2HCl = MgCl2 + H2() 12.1B_HClCFeNaOHDCuSO4 ECaCO32Fe+CuSO4=Cu+FeSO4NaOH+HCl=NaCl+H2O2NaOH+CuSO4=Na2SO4+Cu(OH)23 13. (1) pH(pH) (2) (3) (4)() (5) ()14. (l)t1 (2) 25 20 125 (3) B15. 1 B 2 H2O 3 2Al+2NaOH+2H2O=2NaAlO2+3H2 16. OH / FeCl3+3NaOH = Fe(OH)3+3NaCl CuCl2 +2NaOH = Cu(OH)2+2NaCl 1-2mL1-2?17. 12 Cu Al 3 Cu Fe Al FeCl2 AlCl3 Fe + CuCl2= Fe Cl2+ CuNaOH12.5g, NaCl5.85g,NaOH3.32011A1.-5BBACC 6-10CBBBA11 1 (2) 12. 13.14.(1). P=I2 R=(2 5 A)20.4=250W (2)15. 12.5 16. P=FV=100N0.2m/s=20w =90%17. 18. , 19. 12B3 0.5 4 2.5 . 20.1234 A B. C D.21.123 422.1124V1 (3)602 0.18W1523. 1G=mg=5104kg10N/kg=5105N2F=G=5105NS=160.25 m2=4m2P=F/S=5105N/4m2=1.25105Pa(3)W=FS=Gh=5105N10m=5106 . . .a1S1.b2S2.cS1S2.:1234 ABCDEFB()(1)B_(2) _(3)BEDF_(1)BBC02ACB(C02)A02cH20(3)DEFD2011AB C B D D D A D A A C A D C C1617- - - 18 19 112060120701206070901120 1954 ?19362 2011A DBCCC CACCD BA13