电路如图所示示,AE=EF=FB,BD:DC4:3

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病毒库日期
Application.Nirsoft.AsteriskLogger.A
PSWTool.W32.Asterisk.c!c
RiskWare[PSWTool:not-a-virus]/Win64.WirelessKey
Application.Heur.cmKfbCpMHKkO
Win32:PUP-gen [PUP]
Logger.IAC
Trojan.Win32.Generic!BT
Win32.Trojan.WisdomEyes.0.9996
Baidu-International
Hacktool.Win32.AdapterWatch.80
BitDefender
Application.Nirsoft.AsteriskLogger.A
CAT-QuickHeal
HackTool.Iehv.SD4
Win.Trojan.Agent-679956
Application.Win32.PSWTool.Agent.~A
W32/A-9b3afa3b!Eldorado
Tool.PassView.36
ESET-NOD32
Win32/PSWTool.AsteriskLogger.104 potentially unsafe
W32/A-9b3afa3b!Eldorado
Application.Nirsoft.AsteriskLogger
Riskware/Asterisk
Application.Nirsoft.AsteriskLogger.A
PSWTool.ChromePass.a
K7AntiVirus
Riskware ( 0040eff71 )
Riskware ( 0040eff71 )
not-a-virus:PSWTool.Win32.Asterisk.c
Malwarebytes
PUP.Optional.AsteriskPasswords
Tool-PassView
McAfee-GW-Edition
Artemis!DE64EEDA1CA6
Application.Nirsoft.AsteriskLogger.A
NANO-Antivirus
Riskware.Win32.PassView.czczpg
Win32/Application.296
Adapter Watch (PUA)
Trojan/Asterisk.c
TrendMicro
TROJ_GE.ABD1618F
TrendMicro-HouseCall
TROJ_GE.ABD1618F
TrojanPSW.Multi
Nirsoft Password Recovery (not malicious)
Riskware.PSWTool!
Adware.OutBrowse.Win32.59238
Avira (no cloud)
SUPERAntiSpyware
TotalDefense
The file being studied is a compressed stream!
More specifically, it is a ZIP file.
Interesting properties
The studied file contains at least one Portable Executable.
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Compression metadata
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Portable Executable
ExifTool file metadata
application/zip
ZipRequiredVersion
0x1bec0838
ZipCompression
ZipUncompressedSize
ZipCompressedSize
FileTypeExtension
ZipFileName
autorun.inf
ZipBitFlag
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SHA1 7aea968b3d51ec1e4
SHA256 f89dc4f2b072cb29c00bd36c0dff2ed758ba1c97e5a22e6aceb61
393216:jd/BCnmmlr11fruFVlGeoY2K4V8ig48fXQUue47tC:j9BCnm8EVlx32v8iP8fgUuBU
File type ZIP
Magic literal
Zip archive data, at least v2.0 to extract
ZIP compressed archive (100.0%)
VirusTotal metadata
First submission
12:20:51 UTC ( 5 年, 9 月 前 )
Last submission
11:02:12 UTC ( 4 年, 11 月 前 )
nirsoft_package_1.15.03 [30].zip
3919d0bce0e055e7f303fa9be0f5460a
file-4092638_zip
nirsoft_package_1.15.03.zip
Advanced heuristic and reputation engines
Possibly Unwanted Application. While not necessarily malicious, the
scanned file presents certain characteristics which depending on the
user policies and environment may or may not represent a threat. For
full details see:
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用户名或者电子信箱> 【答案带解析】(11分)(2015o佛山)如图,在?ABCD中,对角线AC、BD相交于点O,点...
(11分)(2015o佛山)如图,在?ABCD中,对角线AC、BD相交于点O,点E、F是AD上的点,且AE=EF=FD.连接BE、BF,使它们分别与AO相交于点G、H.(1)求EG:BG的值;(2)求证:AG=OG;(3)设AG=a,GH=b,HO=c,求a:b:c的值. 
(1)1:3;(2)见解析;(3)5:3:2.
试题分析:(1)根据平行四边形的性质可得AO=AC,AD=BC,AD∥BC,从而可得△AEG∽△CBG,由AE=EF=FD可得BC=3AE,然后根据相似三角形的性质,即可求出EG:BG的值;
(2)根据相似三角形的性质可得GC=3AG,则有AC=4AG,从而可得AO=AC=2AG,即可得到GO=AO﹣AG=AG;
考点分析:
考点1:四边形
四边形:四边形的初中数学中考中的重点内容之一,分值一般为10-14分,题型以选择,填空,解答证明或融合在综合题目中为主,难易度为中。主要考察内容:①多边形的内角和,外角和等问题②图形的镶嵌问题③平行四边形,矩形,菱形,正方形,等腰梯形的性质和判定。突破方法:①掌握多边形,四边形的性质和判定方法。熟记各项公式。②注意利用四边形的性质进行有关四边形的证明。③注意开放性题目的解答,多种情况分析。
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>>>如图所示,在矩形ABCD中,AE⊥BD于点E,对角线AC,BD交于O,且BE:..
如图所示,在矩形ABCD中,AE⊥BD于点E,对角线AC,BD交于O,且BE:ED=1:3,AD=6cm,则AE=______cm.
题型:解答题难度:中档来源:不详
设BE=x,因为BE:ED=1:3,故ED=3x,根据射影定理,AD2=3x(3x+x),即36=12x2,x2=3;由AE2=BE?ED,AE2=x?3x;即AE2=3x2=3×3=9;AE=3.
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据魔方格专家权威分析,试题“如图所示,在矩形ABCD中,AE⊥BD于点E,对角线AC,BD交于O,且BE:..”主要考查你对&&矩形,矩形的性质,矩形的判定,解直角三角形,投影&&等考点的理解。关于这些考点的“档案”如下:
现在没空?点击收藏,以后再看。
因为篇幅有限,只列出部分考点,详细请访问。
矩形,矩形的性质,矩形的判定解直角三角形投影
矩形:是一种平面图形,矩形的四个角都是直角,同时矩形的对角线相等,而且矩形所在平面内任一点到其两对角线端点的距离的平方和相等。矩形的性质:1.矩形的4个内角都是直角;2.矩形的对角线相等且互相平分;3.矩形所在平面内任一点到其两对角线端点的距离的平方和相等;4.矩形既是轴对称图形,也是中心对称图形(对称轴是任何一组对边中点的连线),它至少有两条对称轴。对称中心是对角线的交点。5.矩形是特殊的平行四边形,矩形具有平行四边形的所有性质6.顺次连接矩形各边中点得到的四边形是菱形矩形的判定:①定义:有一个角是直角的平行四边形是矩形 ②定理1:有三个角是直角的四边形是矩形 ③定理2:对角线相等的平行四边形是矩形 ④对角线互相平分且相等的四边形是矩形矩形的面积:S矩形=长×宽=ab。 黄金矩形:宽与长的比是(√5-1)/2(约为0.618)的矩形叫做黄金矩形。黄金矩形给我们一协调、匀称的美感。世界各国许多著名的建筑,为取得最佳的视觉效果,都采用了黄金矩形的设计。如希腊的巴特农神庙等。概念:在直角三角形中,除直角外,一共有五个元素,即三条边和两个锐角,由直角三角形中除直角外的已知元素,求出所有未知元素的过程叫做解直角三角形。 解直角三角形的边角关系: 在Rt△ABC中,∠C=90°,∠A,∠B,∠C所对的边分别为a,b,c, (1)三边之间的关系:(勾股定理); (2)锐角之间的关系:∠A+∠B=90°; (3)边角之间的关系:。 解直角三角形的函数值:
锐角三角函数:sinA=a/c,cosA=b/c,tanA=a/b,cotA=b/a(1)互余角的三角函数值之间的关系:若∠ A+∠ B=90°,那么sinA=cosB或sinB=cosA(2)同角的三角函数值之间的关系:①sin2A+cos2A=1②tanA=sinA/cosA③tanA=1/tanB④a/sinA=b/sinB=c/sinC(3)锐角三角函数随角度的变化规律:锐角∠A的tan值和sin值随着角度的增大而增大,cos值随着角度的增大而减小。解直角三角形的应用: 一般步骤是: (1)将实际问题抽象为数学问题(画图,转化为直角三角形的问题); (2)根据题目的条件,适当选择锐角三角函数等去解三角形; (3)得到数学问题的答案; (4)还原为实际问题的答案。 解直角三角形的函数值列举:sin1=0.28351 sin2=0.50097 sin3=0.94383 sin4=0.1253 sin5=0.65816 sin6=0.65346 sin7=0.14747 sin8=0.06544 sin9=0.23087 sin10=0.93033 sin11=0.5448 sin12=0.75931 sin13=0.86497 sin14=0.66773 sin15=0.52074 sin16=0.99916 sin17=0.7367 sin18=0.9474 sin19=0.1567 sin20=0.6687 sin21=0.30027 sin22=0.912 sin23=0.2737 sin24=0.80015 sin25=0.69944 sin26=0.0774 sin27=0.54675 sin28=0.8908 sin29=0.33706 sin30=0.99994 sin31=0.0542 sin32=0.2049 sin33=0.027 sin34=0.7468 sin35=0.046 sin36=0.4731 sin37=0.0483 sin38=0.6583 sin39=0.8375 sin40=0.5392 sin41=0.5073 sin42=0.8582 sin43=0.4985 sin44=0.9972 sin45=0.5475 sin46=0.6511 sin47=0.1705 sin48=0.3941 sin49=0.7719 sin50=0.978 sin51=0.9708 sin52=0.7219 sin53=0.2928 sin54=0.9474 sin55=0.9918 sin56=0.0417 sin57=0.4239 sin58=0.426 sin59=0.1122 sin60=0.4386 sin61=0.3957 sin62=0.9269 sin63=0.3678 sin64=0.167 sin65=0.6499 sin66=0.6009 sin67=0.4404 sin68=0.7873 sin69=0.2017 sin70=0.9083 sin71=0.3167 sin72=0.1535 sin73=0.0354 sin74=0.3189 sin75=0.0683 sin76=0.9965 sin77=0.2352 sin78=0.8057 sin79=0.664 sin80=0.208 sin81=0.1378 sin82=0.5704 sin83=0.322 sin84=0.2733 sin85=0.7455 sin86=0.8242 sin87=0.5738 sin88=0.0958 sin89=0.3913 sin90=1
cos1=0.3913 cos2=0.0958 cos3=0.5738 cos4=0.8242 cos5=0.7455 cos6=0.2733 cos7=0.322 cos8=0.5704 cos9=0.1378 cos10=0.208 cos11=0.664 cos12=0.8057 cos13=0.2352 cos14=0.9965 cos15=0.0683 cos16=0.3189 cos17=0.0355 cos18=0.1535 cos19=0.3168 cos20=0.9084 cos21=0.2017 cos22=0.7874 cos23=0.4404 cos24=0.6009 cos25=0.6499 cos26=0.167 cos27=0.3679 cos28=0.927 cos29=0.3957 cos30=0.4387 cos31=0.1123 cos32=0.426 cos33=0.424 cos34=0.0417 cos35=0.9918 cos36=0.9474 cos37=0.2928 cos38=0.7219 cos39=0.9709 cos40=0.978 cos41=0.772 cos42=0.3942 cos43=0.1705 cos44=0.6512 cos45=0.5476 cos46=0.9974 cos47=0.4985 cos48=0.8582 cos49=0.5074 cos50=0.5394 cos51=0.8375 cos52=0.6583 cos53=0.0484 cos54=0.4731 cos55=0.0462 cos56=0.7468 cos57=0.0272 cos58=0.2049 cos59=0.0544 cos60=0.0001 cos61=0.3371 cos62=0.89086 cos63=0.5468 cos64=0.07746 cos65=0.69944 cos66=0.8004 cos67=0.2737 cos68=0.9122 cos69=0.30015 cos70=0.6688 cos71=0.15675 cos72=0.94745 cos73=0.73677 cos74=0.99916 cos75=0.52074 cos76=0.66767 cos77=0.86514 cos78=0.75923 cos79=0.54491 cos80=0.93041 cos81=0.23092 cos82=0.06546 cos83=0.14749 cos84=0.65346 cos85=0.65836 cos86=0.12523 cos87=0.943966 cos88=0.50108 cos89=0.2836 cos90=0
tan1=0.217585 tan2=0.74773 tan3=0.041196 tan4=0.51041 tan5=0.92401 tan6=0.67646 tan7=0.9046 tan8=0.39145 tan9=0.53627 tan10=0.46497 tan11=0.71848 tan12=0.0221 tan13=0.5631 tan14=0.18068 tan15=0.1227 tan16=0.8079 tan17=0.66033 tan18=0.9063 tan19=0.66527 tan20=0.20234 tan21=0.4158 tan22=0.1568 tan23=0.6047 tan24=0.5361 tan25=0.9986 tan26=0.8614 tan27=0.4288 tan28=0.4788 tan29=0.769 tan30=0.6257 tan31=0.5604 tan32=0.3275 tan33=0.5104 tan34=0.4265 tan35=0.7097 tan36=0.3609 tan37=0.7942 tan38=0.7174 tan39=0.0072 tan40=0.2799 tan41=0.2267 tan42=0.8399 tan43=0.6618 tan44=0.0739 tan45=0.9999 tan46=1.5693 tan47=1.6826 tan48=1.1927 tan49=1.0092 tan50=1.21 tan51=1.051 tan52=1.0785 tan53=1.4098 tan54=1.1733 tan55=1.1144 tan56=1.7403 tan57=1.5827 tan58=1.0506 tan59=1.5173 tan60=1.8767 tan61=1.4235 tan62=1.3318 tan63=1.1503 tan64=2.296 tan65=2.5586 tan66=2.215 tan67=2.753 tan68=2.2946 tan69=2.8023 tan70=2.6216 tan71=2.822 tan72=3.2526 tan73=3.1404 tan74=3.9087 tan75=3.8776 tan76=4.8455 tan77=4.153 tan78=4.456 tan79=5.307 tan80=5.707 tan81=6.041 tan82=7.207 tan83=8.593 tan84=9.587 tan85=11.32 tan86=14.942 tan87=19.16 tan88=28.515 tan89=57.144 tan90=(无限)投影的定义:一般地,用光线照射物体,在某个平面(地面、墙壁等)上得到的影子叫做物体的投影,照射光线叫做投影线,投影所在的平面叫做投影面。投影包括平行投影和中心投影。平行投影:由平行光线(如太阳光线)形成的投影称为平行投影。中心投影:由同一点发出的光线所形成的投影称为中心投影。平行投影特征:平行投影的投影线是平行的。①等高的物体垂直于地面放置时,在太阳光下,他们的影子一样长;②等长的物体平行于地面放置时,他们在太阳光下的影子一样长,且影长等于物体本身的长度;③两个物体竖直在地面上,两个物体及它们各自的影子及光线构成的两个直角三角形相似,相似三角形对应边成比例。已知物体影子可以确定光线,同一时刻关线是平行的光线下行成的,过已知物体顶端及影子顶端作直线,过其他物体顶端作此线的平行线,便可求出同一时刻其他物体的影子。中心投影特征:中心投影的投影线交于一点。①等高的物体垂直于地面放置时,在灯光下,离点光源近的物体的影子短;离点光源远的物体影子长。②等长的物体平行于地面放置时,一般情况下,离点光源越近,影子长;离点光源越远,影子越短,但不会小于物体本身的长度。③点光源、物体边缘的点以及它的影子上的对应点在同一条直线上,根据其中两个点,就可以求出第三点的位置。④空间图形经过中心投影后,直线变成直线,但平行线可能变成了垂直相交的直线,中心投影后的图形与原图形相比虽然改变较多但直观性强,看起来与人的视觉效果一致。⑤如果一个平面图形所在的平面与投射面平行,那么中心投影后得到的图形与原图形也是平行的,并且中心投影后得到的图形与原图形相似。技术提示:投影不是影,影是不透明的,只有轮廓,投影是透明的,也包括各面上的棱.投影图包括的棱,看到的用实线画,看不到的用虚线画.例如,三棱锥在水平面上的投影包括棱。平行投影与中心投影的区别与联系:
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