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2016奉贤初三化学二模

1-ABABD CDCAAC DB 16-20CABCB 21-25 DCBDC 26-30CBCDC 31-35 ADDBB 36-40DEFAC 41-45 ADBBC 46-50ACADB 51-55 BCCDA 56-60DDCBB 61. it 62.of 63. is 64.overlooking 65. became 66.which 67. the 68.geographical 69. equipped 70. that 短文...

在印象中没有,但是2011年海淀一模或二模的作文好像是条形统计图

1-ABABD CDCAAC DB 16-20CABCB 21-25 DCBDC 26-30CBCDC 31-35 ADDBB 36-40DEFAC 41-45 ADBBC 46-50ACADB 51-55 BCCDA 56-60DDCBB 61. it 62.of 63. is 64.overlooking 65. became 66.which 67. the 68.geographical 69. equipped 70. that 短文...

1. CABC A B CDCDACDB D B CBA 2. (1)What has happened: We have just moved (2);This has not been easy (.3); I have…put (4); I haveever seen (5) What hasbeen happening: I have been working (6);I havebeen trying (7) haveexplaine...

海盗小说,

(1)根据牛顿第二定律得: mg-f=ma 而 0.1mg=f 解得:a=9m/s2则v2=2as=2×9×0.18 v=1.8m/s (2)设装置落地时的速度为v1v12=2aH=2×9×4.5=81 v1=9m/s t1=v1a=1s所以鸡蛋继续下落时间为0.2s,落地速度为1.8m/sa蛋=(v1?v)t2=9?1.80.2=36m/s2对蛋分...

(1)液体对容器底部的压强相等,SA<SB,GA=FA=pSA,GB=FB=pSB,可见GA<GB,放入小球后,若小球漂浮或悬浮,液体对各自容器底部的压力相等,GA+G甲=GB+G乙,因为,GA<GB,若小球下沉,液体对容器A底部的压力:FA′<GA+G甲,液体对容器A底部的...

①V水=m水ρ水=2kg1.0×103kg/m3=2×10-3m3答:水的体积为2×10-3m3.②A容器对水平面的压力:FA=GA总=(m水+m容)g=(2kg+0.5kg)×9.8N/kg=24.5N,A容器对水平面的压强:PA=FASA=24.5N0.01m2=2450Pa.答:A容器对桌面的压强为2450Pa.③h水=V水S=2×103...

(1)∵πx2+πxy=2π∴y=2?x2x(4分)∵x<y∴x<2?x2x,∴0<x<1(6分)(2)依题意,作圆锥的高SO,∠SAO是母线与底面所成的线面角,(7分)设圆锥高h,∵cosπ3=xy=12,y=2x∴h=3x∴x=23,h=2(9分)V=13πx2h=33πx3≈0.99m3(11分)答:所制作的...

狗毛

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