江苏初二(八年级)暑假作业答案 -pg电子娱乐平台
2012-07-31上传
数学:练习一1.不等于-52.3062m4.b5.d6.b7.y=-4/x-18.原式=2/a 2=2/5练习二1.x=52.y=100/x3.304.d5.b6.a7.12m8.甲的方差=2,乙的方差=0.4,所以乙更稳定9.y=2x的平方-3x-2练习三1.(1)(a 1)的平方(2)a的平方-2a 12.两直线平行,同位角相等。3.m/24.d5.d6.c7.x=7/38=3cm9.平均2.44小时,中位数2.5小时,众数3小时。练习四1.0或根号74.c5.d6.d7.原式=-x的平方 4x/x-2c,(-1,0)9.水深15/4练习五1.最后一个式子9cm4.b5.b6.c7.s1=s28.x=2无解9.车速=20m/s=72km/h70km/h超速。10.(1)无数组英语:exercise1:一.a.1.realized2.excitement3.development4.wives5.poisonb.1.herself2.fortieth3.successfully4.heroes5.angrily二.1.a2.c3.a4.c5.c三.1.c2.c3.d4.d5.aexercise2:一.a.1.cilpped2.shiny3.fantastic4.including5.recentb.1.wasplaying2.taught3.have...learned4.willhold5.hastaken二.1.b2.d3.b4.d5.a6.d7.c8.c三.1.aboutpastpresent2.ofshining3.usedwaste4.seemshopeless5.athighspeedscreaminglaughingthroughride6.bird's-eyeview四.1-5.abccd6-10.abcadexercise3:一.a.1.waved2.forgotten3.married4.interview5.impoliteb.1.harmless2.clapping3.unhonest4.useful5.marriagec.1.fromtimetime2.turnpark3.playchess4.bringmanyadvantages5.asoftenbefore二.1.hasn'teatenanythingyet2.hasbeenhere3.finishedmonthago4.howlonghasbeen5.hasbeen三.1.important2.useful3.necessary4.easy5.difficult6.change四.dbcacexercise4:一.a.1.includesincluding2.experience3.shiny4.harmful5.excitedlyb.1.weighs2.issleeping3.stops4.willshow5.lived二.1.a2.c3.d4.a5.a6.b7.c三.1.hasn'teatenyet2.havedoneyetyeshave3.hasneverbeen4.nohasn't5.haveseen四.bdcacexercise5:一.a.1.successful2.environment3.performers4.experience5.abroadb.1.haveread2.isdoing3.havetaken4.havelearned5.joined二.babdc三.1.weather2.9:00a.m5:00p.m3.parks4.waitline5.right物理:练习一:1.gkg向右调节游码3.72g4.c5.c6.d7.a8.c将北侧物体放在左盘(3)dbaec10.质量11.0.664g12.10.7元/千克练习二:1*10的三次方每立方米的水质量为1*10的三次方kg2.质量体积密度变小不变变小3.b4.b5.c6.c7.a8.d9.d10.6513427811.232.2kg12.500立方cm0.8*10的三次方kg/立方m13.做过的...练习三:练习四:1.b2.d3.b4.b6.8.98.95.140立方cm所测物体体积大于量筒中水的体积7.50g70ml8.40t9.耐高温不能硬度练习五:1.化学分子2.分子处在永不停息的无规则运动中吸引排斥3.热水温度高5.摩擦起电,能吸引轻小物体同种电荷相互排斥6.原子核夸克层次大爆炸7.c8.c9.d10.a11.c12.d1314.1.89216*10的21次方数学:练习六:4.b5.d6.b7.原式=2a/a的平方-4=6/564m,48010.(2)当adc=90时练习七:2x-1/-10x-52.减小4.d5.a6.a7.ae=28.中位数=9,众数=89.y=4/xy=2x 2练习八:1.y=1000/x2.-6.14*10的-4次方114.d5.c6.d7.20m8.原式=(-x/2)-315m10.(2)bc=2cd练习九:974.b5.c6.a平方cm8.x=39.最短路程为5km练习十:1.x=-22(蒙的)3.y=3s/2x4.c5.c6.d7.面积为1/的n-1次方8.x=3英语:exercise6:一.a.1.course2.program3.education4.restart5.designerb.1.printers2.knowledge3.easily4.more5fortable二.1.a2.d3.c4.b5.c三.1-5.dabac6-10.acdac11-15.bcadb四.1.way2.dictionary3.meanings4.second5riendexercise7:一.1.us2.endless3.producer4.marriage5.inches二.1.b2.c3.a4.d5.d6.c7.d8.c三.ccbbd四.1.playmaincharacter2.bewrittenknowabout4.markedbright5.mindtellingallexercise8:一.a.1.harmful2.excitement3.designers'4.donations5.luckiestb.1.toplay2.was crossing 3.be used 4.are told 5.aren't 二.1.b 2.b 3.c 4.d 5.c 6.c 7.a 8.b 9.b 10.b 三.1.yes 2.surprisedly smiling 3.这是那个善良的女人种给我第一颗善良的种子的地方。 4.he saw nothing dirtyboy. 5.最后一句 exercise9: 一.1.development 2.unpleasant 3.impolite 4.useless 二.1.c 2.c 3.a 4.a 5.a 三.1.was designed 2.arespeak 3.was given 四.cabbcexercise10: 一.a.1.advantages 2.expensive 3.simple 4.daily 5.marriage b.1.is loved 2.open 3.was sent 4.have heard 5.are sold 二.1.b 2.c 3.a 4.c 5.c 三.1-5.bbcca 6-10.bbdad 物理: 练习六: 1.弹性 运动状态 0.2n2n 0.2kg 10n5.竖直向下 6.c 7.a 8.b 力的作用是相互的2.增大 增大压力 变滑动摩擦为滚动摩擦 水平向左10 4.d 5.d 6.d 7.c 8.d 10.(1)水平匀速直线 粗糙程度粗糙 (3)摩擦 练习八:1.c 2.a 3.d 4.d 5.b 6.力的作用是相互的 桌面 7.弹性形变 运动状态 8.作用点 方向 9.竖直向下 受到 10.增大 增大 11. 10 12.13.略14.(1)压力 控制变量法(2)匀速 3.3n 总=25t20t,所以不能 数学: 练习十一: 1.40kg 2.(2,4)或(-2,-4) 60/134.d 5.c 6.b 7.120 8.原式=x-2=-39.(1)m=-1 (2)b(-1,-2)(3)经过b 2.对角线垂直的四边形(如菱形,正方形)3.y=-5/x 4.b 5.b 6.d (2)a=80b=80 8.x=3 9.y=2/x y=x 1 10. 10cm 练习十三: -2/(x的平方-1) 4.d5.c 6.c 原式=-19.v=240/t 至少48t 货物 10.甲:(x1 x2)/2(元/千克) 乙:(2x1x2)/(x1 x2) (元/千克) 练习十四 104.c 5.c 6.b (2)乙方差=0.0088.自行车速=12km/h 客车速=36km/h 9.(1)受影响 小时练习十五: 2.直角三角形3.y=-12/x(好难的) 4.a 5.d 6.a 7.原式=1/(a 1)=100(更难) 10km英语: exercise1 一.a.1.host 2.success 3.duty 4.volunteers 5.education b.1.be put 2.is taught 3.will discussed4.has been collected 5.was designed 二.1.d 2.a 3.a 4.b 5.b 6.d 三.1-5.bcdac 6-10.adcbc 四.1.especially 2.everything 3.helping 4.themselves 5.send 6.understand 7.realized
君,已阅读到文档的结尾了呢~~