湖南省株洲市株洲县2023-2024学年七年级数学第一学期期末达标检测试题含解析

2023-2024

i.

3.^ÉmOmmBohœ».

->Æ&®:*±WU2>Nb®,$<hJS3#,^36#.£«/b®£Hm0'NfcW,RW-®>m0m

1.lUTfà®,S^fflWÔW()

A.B.llccrn

c.D.

2.B&ZAOB=120°,ZCûr>ÆZAÛ5rtMZCOD=6()°,JRUZAOD^ZCOB^JèWÆfô^M^().

A.ZAOD=ZCOBB.ZA0D+ZC0B=120°

C.ZAOD=-ZCOBD.ZAOD+ZCOB=180°

2

3.ÀTlWlEÊ^^MH^nT“S3e”&23=3+5,33=7+9+11,

43=13+15+17+19,•£/n3“»”JB,X+W-^^2019,JÜ!|m()

A.43B.44C.45D.55

4.3^30W,)

A.70°B.75°C.80°D.90°

5.M,ÆAABC43,DEMACâ9MY^,Ja##J£BC,ACT^DÏDE,ZB=60ZZC=25°,JÜÜZBAD

()

C

A.50°B.70°C.75°D.80°

6.JnOg3x-m=2œ2,M()

A.4B.-2C.2D.-4

7.30cm,1cm,Mil!2cm<PT^-ME^,xcm,

WJAfêA()

A.x+l=(30-x)-2B.x+l=(15-x)-2

C.x-1=(30-x)+2D.x-1=(15-x)+2

8.iox+6=i2x-6^-mffl®:mm,,n

A.$n^A#io^,$nM<A#i2&,>^^6mm*#

B.M<A#iomMKTôWMft;$nM«A#i2«,Mimim

c.M«A#io«,^AfflTômm*#;W«A#12®,ife£»T6mm*#

D.$n>$A#io^,mum,R|#O^6Wffi

9.afczfcTXM~7ü-&AS2(x-1)+3a=3MMA4,MaMM()

A.-1B.1C.-2D.-3

10.KW:0,-1,-2,-3,()

A.-3B.0C.-1D.-2

il.£O«AM«I&,cêffl^ft^MgM,Ma2018+2019£>+c20'8MMA

A.2019B.2014C.2015D.2

12.(>

A.O^Mït;B.-«MOÆlc.tf3+-Æ=&Zl«D.3a2b^-ab2&^^

a

-,W#20#,

13.ÆA:

^HÆO"RJMA=:0".M,ÆÜ-tèAio

aMO

14.^B^x-^=|MA?£_________________;

15.^mfnMWMiioÆ,»MM/k«WBt,WM10%,ÆfêftMWMWATG.

16.XMASax+4=l-2xMMAX=3,Æüa=.

17.$nM1ïM6iPËzk,iaft+ôinË,Wk'fè&iiïik,Æft

18.(55»B&ÆOil^AB±W—Æ,ZCOE=90%OF&ZAOEfôY5»l.

(l)^âC,E,FÏOABÔÙRMCftl®1tfraW,$WZBOE=2ZCOF;

(2)%ÜC^E,FWABmM2j^)ltf,(l)4’â<J^îù>^W^±?if^l±l^ât^iÙ«0ÆSÈ;

2

(3)^®2^âWâsOFÿtâOWf-lf-Wm°(0<m<180°)W^OD.T&ZAOC=n°ZBOD=(M--n)°,^ZDOE

3

(ffl'â-«æj5£T«^)

19.(55»

(1)168km^WÜfe^BtfB^lRjWfî,10km/h,iWzhHWWWa,

(2)^T7KWîïÈ?|5AWeS^W^3^^,WW$T|JB,

ZxfAinÀ,A£-iS«m,^WiiefiW.

20.(85»4tÎHÏ^<:X2-(5x2-4y)+3(x2-y),^4>x=-1,y=l.

21.(105»BfclhA=3x+2y,B=4x-2y,^A-2BÔÙ<.

22.(105»AC±AE,BDZBF,Z1=35O,Z2=35°,ACBD^W&tfAEBF

@^Z1=35°,Z2=35°(B^I),m^Zl=Z2.^flA___//___().

X0^/AC±AE(B^),^f!UZEAC=90o()

ffi\^ZEAB=ZEAC+Z\=\25°.

^^,ZFBG=ZFBD+Z2=_°.

ffiVkZEAB=ZFBG().

W___//___

23.d25»A(®»^);B(m«E),cŒmm»!D(iRjaw^)

a

¥>‘¥*®WITOlI»»¥WWMW

‘OS-Wœmœ£MWIOm»OWIMOtëI»#WXim

[WJ

3:W

WWWWr?»'a

sWÈtf^‘imWWWW'□

‘5®#™^W«<S¥fe&H4>)IA133>Èft'fl

:«&Wi¥^kv:W[W£]

'¥Y^W‘WW&'KLWI

3'T

‘+»^EIWWW^W^9S^‘^£®4z>‘®MAK葉¥#:WO'-

iY<P^^^Wg^?F(^3EWï)gtW4>^[W¥slK‘^^OfrsMW^q-Mt^P(fr)

:®+Wâé^Mr®¥#WWTÏ?i»M(£)

:WWW^'ElW^WMW^g^Ou^)‘4HSS(£)

s=U‘=Ul(ï)

:®feir^±^0‘WWTKl^W•(£E‘lE)HWO«iWBœi^‘(S4tW^tB§4

ÔTHZAOD+ZCOB=ZAOC+ZCOD+ZCOD+ZDOB=ZAOB+ZCOD,SfW+M

[WJvZAOD=ZAOC+ZCOD,ZCOB=ZCOD+ZDOB,

ZAOD+ZCOB=ZAOC+ZCOD+ZCOD+ZDOB,

=ZAOC+ZCOD+ZDOB+ZCOD

=ZAOB+ZCOD

*.*ZAOB=120°,ZCOD=60°,

ZAOD+ZCOB=120°+60°=180°.

D.

3,C

[^1w™,«TOMW»S^ftiW2019

1008^,lOOsmMfôHBPWW.

[W1v«>2^«2^<^,

flfia,2+3+4+...+m=("î+2)(m~1),

2

V2n+l=2019,n=1009,

2O19^A3?WJ^1009>bW^,

am=44M,(44^)(44-l)=989|

2

i/nu.(45+2)(45-l)

âm=lB},--------21-------L=134,

2

1009i

BPm=l.

«:C.

4'B

V3^30Wtâ®2+-=-,

22

30x—=75°,

2

lîfc&B.

[«]

5>B

W:DA=DC,fê«W=AW1O^Ï!lZDAC=ZC,

«ÆS^tBZBAC,i+MBPôT-

W:VDElACKlOY^,

.*.DA=DC,

.’.ZDAC=ZC=25°,

VZB=60°,ZC=25°,

.’.ZBAC=95°,

ZBAD=ZBAC-ZDAC=70°,

àfcifeB.

6>A

[^1^x=2^À^SBP^MlJ^m.

[W^]^x=2^À^,^6-m=2,

.*.m=4,

A.

[«]

&iB2f£BPW^.

7,D

WÈIE^WH^iàM^tH^BPnr.

[W]V-fe^ÔÙ^xcm,30cm,(15-x)cm,1cm,

jfeifill2cm.’.x-1=15-x+2,Ï&J&D.

8.B

LMtfrlS^tFf^BWÆ,BPWHl£te.

7»^10x+6=12x~6,

W&B.

9,A

[Wffiliex=lftÀ2fg,BPRT^lJ-^TaBPPIW.

(W1ffix=4ftÀ3rS1f2(4-l)+3a=3,

a=-l.

SfcÆ:A.

IMI

WeiWtt.

10,A

[#Wr]mæ<S&*/bHs&ÉlüOLBrtfo,«zbTo,

[#$?]V1-21=2,1-11=1,1-11=1,

ÏÏO1<2<1,.‘.-l>-2>-l

•*.0>-l>-2>-l

îftfë:A.

[»]

OrtTo,M<hTo,

11,D

tefüa,b,cWM,ftÀlM^i+»BP

)W:a=-l,b=0,C=l,

WM^;=I+O+I=2,

i&fà-.D.

[âm

WS^«ifêÆtfca,b,c

12,A

r^wiA,B,cæmg,

LWMlA.@^W-Mfc1ÈnT^^^,AiOM

BW»mWWœ-bBi4W^;

a

^W3a2Z^-fl£>2^>I^J3b

fàfà:A.

rârtJ

«MWWWWMlWM.

-,(W4#,W#20#,^^IÆ^«±)

13,1.

[##f]WWftHftFWn^mî£1l3O.

[WJËr‘MM^H;O”fôÆ5üiW:a=l.

^^1.

14,x=2.

(W1M:iW#:5x-3x=4

2x=4

X=2

X=2

[«]

15,1

CW)M:mmix7C,È®tW:(1+10%)X=110x0.8,M»x=l,

17Ü

1.

[ÛB#1

16,-3

I^tFrlV^^»8ox+4=l-2xW^x=3,

.’.3a+4=l-2x3,të?W;a=-3.

-3.

17,-2

LW1«MSB,BPWïB^.

[WM]«MSB,U£j6HfcK,ifiW+ônS,m»2H$,zKiBW-2^,

-2

[Æffltl

#S«ffliEM^AW«&B5CæjS,«fà,*fi&iP,Æ*MS£:®.

H,M^S(**S«7/bS,#64#.M^WH£fcWJ,)

18,(1)ÆMtff;(2)fâL,SÈÆM^f;(3)(30+|n)°

LW](1)&ZCOF=a,K!|ZEOF=90o-a,«MÆWâlM^HdZAOF,ZAOC.fëtÜZBOEWnï-,

(2)ftZAOC=Ç,^.ÏÜZAOF,fë&ZCOF'ZBOE.BPnJMtB^;

(3)^ZDOE=180°-ZBOD-ZAOE^ZDOE=ZBOE+ZBOD^iZAOE=90o-ZAOC,fVUWPôT.

[#M1M:(1)T&ZCOF=a,^ZEOF=90°-a,

’.’OF^ZAOE^^.,

.’.ZAOF=90°-a,

:.ZAOC=(90°-a)-a=90°-2a,

ZBOE=189°-ZCOE-ZAOC,

=180°-90°-(90°-2a)

=2a,

^ZBOE=2ZCOF-,

90°-B

(2)M:T&ZA0C=p,JÜIJZAOF=-----^-,

.•.ZCOF=45°+^-=—(90°+p),

22

Z.BOE=\89°-^AOE,

=180°-(90°-p),

=90°+p,

:.ZBOE=2ZCOF-,

(3)M:

EE

ZI)OE=1X()-ZBOD-ZAOE,

,2/7.

=180°-(60-—)°-(90°-n°),

3

/5X

=(30+-n)°,

3

2/7

M4,VZBOE=180Ü-ZAOE=180°-(90°-n°)=90°+n°,Z_BOD=(60-—)°

3

2/71

ZDOE=ZBOE+ZBOD=(90°+n°)+(60-—)°=(150+-n)°

33

^ZFOD<180°fà,WTO-ê-M,

(30+-w)

3

[«]

19,(1)37km/h;(2)MT13*.

r^tlTl(1)^^MMxkm/h,«Mit,É^mfê+Z.ms=168krn^g,^SBPRT;

+Zxiw=i^j^®,fêmgfw.

[W1(1)M:Xkm/h,

WM,»®2x+2(x+10)=168

Wx=37

37km/h.

(2)M:iSmffiTx^,

WM.

1XX,

-+-+-=1

535

fëx=1.5

Z.PA>T1.5X.

20>-x2+y,2

[##rl»Mx=-2,y=2RAi+lfW;

[WM1M:x2—5x2+4y+3x2—3y

=-x2+y,

x=-2,y=2Bt,

J^=-2+2=2.

[»]

21>A—2B=6y-5x

[##r]apnT^SJ^.

[WJM?:‘:A=3x+2y,B=4x-2y,

.’.A—2B=3x+2y—2(4%—2y)

=3x+2y—Sx+4y

=6y—5x;

22>AC;BD;iOâlW;M^5C;125;