22463222224632222222AB22220202021學(xué)年蘇省常州市壇區(qū)七年（下）期末學(xué)試卷一選題本題8小題每題2分共16分1Aa

+23

BaaCab

D＝ab2abAa+1a1Ca2D223y6AB4C3D3436cmA3cmC125ab2451A125

B130

C

D6A3B4C5D671003

C{

13

D{

13

8①bab②③xx+2④

22xy22xy022223260A1

B2

C

D4二填題本題8小題每題2分共16分9mm10xy1m0.00005212b2213CDECABCDACADBACACDDAC14x15824+216

+y2三解題本題9小，68。17題10，1819每題8分第21、22、23每6分第24題8分第25題10分如特說，答寫文字明演步或理程17112021+222xy181222ab4b+419

23322332222222222212

??220x+y3xy11

2xy+xy211C18022720084400258415/8423①34②33③2+4④55551

22b3x

1??2

24{

12143325

2222BCFC2ABEF1①3BB2②BDE3G3CBG3CDG88四附題本題5小，共20分（）空題本題5小，小題2分，共10分）264xy21272x+3+y+12+y+z28AB1529DABEBC4ECCDAEBF4ABC30{a}a55.3}0{b32

12

（）答（大共小題共10分如特說，答寫文字明演步驟推過）31α2+901①eq\o\ac(△,Rt)ABCACB90BDABCABD2①ABC100B10ABC②ABC60B20③3②BClAABC50P

2246322224632222222222363622222220202021學(xué)年蘇省常州市壇區(qū)七年（下）期末學(xué)試卷參考答案與試題解析一選題本題8小題每題2分共16分1Aaa3Cab

BaaD＝ab+2a3aAaaBaba2+bab＝bD2abAa+1a1Ca2D22Aaba+1b+1Bab1b1Cba2Daba23y6AB4C3D3ax26226a4436cm

ABABA3cmC1263x6+335ab2451A125

B130

C

Dab245451806A3B4C5D6nn2n4471003

222222222222222222222222

C{3

D{3

{38①bab②③xx+2④60A1

B2

C

D43bab②③x+2x+1+11④60二填題本題8小題每題2分共16分9mmmmmm1mm10xyxyxx+

5552xyx5552xyxyx2yx231m0.000052

5.2100.0000525.2105.21012aba222bab222ba213CDECABCDACADBACACDDACABCDACD80BAC100ADBAC1DACBAC505014xx+1xx11x115824+28

x2422x2y32x4+2223+2

82

2022220222222222222223222228816

+y2

6

①①②2+22+4mx1+22126

12

56三解題本題9小，68。17題10，1819每題8分第21、22、23每6分第24題8分第25題10分如特說，答寫文字明演步或理程17112021+222xy1+4232+2xx4x4xy+4yxyxyx+4181222a

4

+4abn2n2+n

32223222??23322222222233222ab4b+4ababa+4aba21912??2①3x③②2x33xx1③y22

2①②x120x+y3xy112x

+xy+y3xyx+y﹣4xy94152x++2xyy3xy9x+yx+7x+xyxyx+y177211C180

22222222222222CCAD23180CAD22720084400258415/84x848428023①34②33③2+4④555513232b3x

1??2

23＞2

22222222222222222222222ab0aabbb+b23a+x

12

2

12xx

1212

22224{

121433212

{x3211k4k3302x41k21k125B

CFC2ABEF1①3BB2②BDE3G3CBG3CDG88B+180C4B180B2DCDNCMABCDDNCMEFCMB+180E+180DNCMNDCB+BCDECDE

2222222222222232ABCECDEABCCDEABCCDE88423CBG3CDG42CBGCDG14CBG+GCBGCDGGC14G+14102四附題本題5小，共20分（）空題本題5小，小題2分，共10分）264xy212yy1xy14y+2+1+1+1+1272x+3+y+12+y+z8{②①x2①②5+2+222③x

??2

6x2+6828AB15

75251BFA+1180180AB15180+152B901652BB90B2BFA1AB152B+15B902B+15+B

4△4△4422B757529DABEBC4ECCDAEBF4ABC

30BES△1SS1△SS+4+15△△eq\o\ac(△,S)DABSS△eq\o\ac(△,S)eq\o\ac(△,)△eq\o\ac(△,S)S△△eq\o\ac(△,S)eq\o\ac(△,)eq\o\ac(△,S)SS5△△SS+5+1△△eq\o\ac(△,S)SS24△△SS+△△eq\o\ac(△,S)3030{a}a55.3}0{b32

12

79

1x2x13x223x2+1

24442444321279x7x（）答（大共小題共10分如特說，答寫文字明演步驟推過）31α2+901①eq\