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A.375B.400C.425D.450

2.BMtW432,tMH

A.2B.8C.10D.16

3.wa?4b^^2oat>8o,a^g40Mi

A.70B.90C.100D.120

4.AMI'7lv|w|AjAJAAl18Kcm,

A.3cmB.6cmC.9cmD.12cm

5.0,

A.-5B.-2C.0D.2

6.x2x-3=5x+8,

A.-3B.-5C.5D.8

7./hfliifi/ytWT807b,XbriMT30TK,Mb/XSfiT50TKO/b

A.M±^B.IT^C.D.117]

8./J^HW^WbW3,

Mfi^5/3,^PbW^SWi^MWH^ilirWW

A.7/3B.5/3C.3/5D.1/7

9.5g—36cmWLb>#b[W4Hbj54cm3,

A.1.5cmB.3cmC.3.5cmD.4cm

10.y=8/x(4,2)

A.0.5B.1C.2D.3

11.5gx+y=0,x-y=20,xy

A.±10B.±5C.±2D.±1

12.—1620oJJbb7rbJbM^bb>7E

A.9B.10C.12D.15

13.a,

A.2aB.3aC.4aD.8a

14.12

2/5,

A.25WB.27WC.30WD.32W

15.37W

A.5B.6C.7D.8

(Aio/hH,￡ao#)

1.1/44-1/5=__

2.(3/5)x(5/4)=__

3.31.544=__

4.B^O^ABC,A=30°,B=60°,PMC=___%

5.7iWW__-

6.S￡n—3cm^n4cm,PMAiAA

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7.QAlaziMAlEbj,^^cota=6/7,Pysina=__□

8.WMtMSt?A.3/4B.4/5C.5/6D.6/7

9.[-3,3]___.^o

10.A:B=1:2,B:C=3:4,PPJA:C=__:___□

(^3/bH,</b^5^,5^15^)

1.100ye,JJtebTAHibf(Bib

JTAAbftBAMMbWLU0.85.

liMW=100X0.85=85ju

2./MJWMI-MESBWAAWE-

Afflt45MUMAtlWW62itMiML^AW^AAM

B:AOA￡OWO:=45+62=107AM

3.-AAMBMWAiWAAWAMAA6A0AAnB4W5°,a

B:AWM^AUOA180°,AMlAAAA60°A45°,

MAAAIWBC=180°-60°-45°=75°

ra>bAAH(M2AH,^AHioA,A20A)

1.AW>W1450MAO

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ia±M?

W:AWiWBi'AtT60xi=60MM

ALU60MAfiUWia?,LMHHUl'0]=HW-W=(450-60)-60

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2.1.5it,TO2A)HAHJlWiW^

1.2it,MiAMWAfiW^

M:iAAHIAAfiUAMAx,A^lAMfiUAMAy

BAlx=1.5y,ffiAAx+2=1.2(y+2)

Wx=1.5yZtAM—A^AA,MAJ1.5y+2=1.2(y+2)

B&AA?WMAJy=10A,WAAM-WAWMAJx=1.5

x10=15Ao

JWABiAA15/JAiAMioA

(A2A^,15A,A30A)

1.BMAffiWI:27AAA,

B:i￡iEA#AWAAx

IEA#AWM=x3=27

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JWIEA^&WbcM3A

2.AliAAAiooA￡Kr[bAAIOTU^A40A,20TU^A30A,

5OTC^A3OA°io

7C>207G?^507UO

B:i07n^ABAWM40/i00=0.4,20TC^AWW

30/100=0.3,50JCMAOM>30/100=0.3

E/rA'bOWfiWATE107U>207CHK50jAftrlAWWA^JzE0.4>

O.3AO.3,AAM