|
|
??????????????????
??????????
????????????8?????3???24??? 1??3?????
11
D?? 33
2????????20cm????xcm????
A?3
B??3
C?
A. 20?xB.
20?x
C.20?2x D. 10?x 2
3??????????
A??(?3)= ?3B??[?(?10)]= ?10C??(?5)=5 D??[?(?8)]= ?8 4???????5?31?????????????803??????????????? A?810
6
B?8.0310
7
C?8.0310
6
D?80310
4
5??????2???5???????? A?0B?7 C?14 D?28 6??3<a<4????|a?3|?|a?4|? A?2a-7
B?2a-1
C?1
D?7
7??????x?2y?1???3?????2x?4y?1??? A?4
B?5
C?7
D?????
8????????
1?2?
1
?1?2?3?0?1?2? 31
2?3??2?3?4?1?2?3?
31
3?4??3?4?5?2?3?4?
3
??
???3(12+23+34+?+99100)=
A?979899 B?9899100C?99100101 D?100101102 ????????????10?????3???30??
9????20%????20%????6%??
xy2
10?????????5
11???x?4???3??????_____________
12??3a
m?2
b4??a5bn?1???????????m+n?m
22
3xy?(m?2)xy?1????????m???13????
14???? ?(5x?3y)?(7y?x)?_______________.
2222
15????a?b????2a?2ab?b?a?mab?2b??ab???????
16?M?N???????????MN????2???M??????1???N????? ?
17?????a1 ,a2 ?a3???an????????????????1??????????????a1 =2, ?a 2007?_________________.
18??????????????????x??48??????????????24??????????12?????2010???????
(?18?)
????????????3??, ?40???????????
19??????????5???20??
2?2?(?3)?1???3????4????11????19? ?2??23?(1?0.5)??? ??3
1
214378
?)?(?60)?3? ?3.5(? )|??4?(?876431215
20???????2??????6????12??
22224y2??3y?(3?2y)?2y2?(4xy?3xy)?(1?4xy?3xy)?? ?1??2?
21??????8?? ????????2ab+2ab
?????
22??????10??
??(x?3)?y?2??????z????????????(x?y)y?xyz??.
23??????10??
??????????????????????????A?????0.1?????B?????50??????????????????????????????????0.2????
?1????????????x????????????????????????????2????????????????20?????????????????
2
?
22
??-??2?ab-1?+3ab+2?,??a=2,b=-2
2
2
? ?????(a?b)2??a?b??????. ??????: ???a?b??________________________________________. ???(a?b)(a?b)??________________________________________. ? ???a?b??????, a?b?(a?b)(a?b)??, ????:
2
2
2
2
a?b??
a2?b2
?a=3, b=2? ?a=-5, b=1? ?a=-2, b=-5?
2
2
(a?b)(a?b)
? ??????a?b??????, ???a?b?(a?b)(a?b)??: ?a=_____, b=______?, a?b=_________,(a?b)(a?b)=__________. ? ????: _______________________________________________________.
2
2
?35?21?65 ? ?????????: 78
25??????12??
????????55??????????1????????????A??????B?C?D?????????????????????????????A?B???A?B??1??4???B?A???A?B??1??4?????????????????????????????? ?1?A?C? ? ??B?D? ? ?,C???1? ?? ?2????????????A?B?C?D????????????? ?3???????A????P???????????2??2????1??1????2??3????1??2????????P????
22
??????????????1400????????200??????????????????????????????????????????????????:
?? ??
? +5
? ?2
? ?4
? ?12
? ?10
? ?16
? ?9
(1????????????????????_____________?? (2?????????????????????_____________?? (3??????????????????????____________??
(4?????????????????????50???????????????????15????????20?????????????????????
???2014??????????????
2014??????????????
???1????4???22??????100??????120??
2????????????????????????????????????
??
3??????????????????????? ?????(????5??????3???15?)
1??????????????3?-2??????2???????????5???????????????
???5?3????1?-7????1?3????5?-7? 2???????????? ?
?????????????????????? ????a?=?b???a=b ?????????2????p
3???????????????AB??????????????????? A????????? B????????? C???????? D??????
?x?1,4????????????????
?y??1
?x?y?0,?x?y?0,
A.?B.?
x?y??1x?y?1???x?y?0,
C.?
x?y?2??x?y?0,
D.?
x?y??2?
5?????????????AB?CD ??? ? A.?A=?C B. ?ADB=?CBD C.?A+?ABC=180D. ?CDB=?ABD
?????(????5??????4???20?) 6??????????__________________.
7??????????????????ABC????????????????11?
??????????4??????????????????????????????????____________. 8??????AB?CD????O?OE?AB?O???? ???EOD?36????AOC?
.
?
9????DE?BC?AB?AC?D?E???CF?BC???????ADE?50??ACF?110???A? ??
E C 10.???A????????y?2????????x?1????????AB?y?????AB=3??B????? . ?????(????5??????6???30?)
?m?n?411.??????
2m?n?5?
12. ??????
?3(x?1)?y?5
5(y?1)?3(x?5)?
13???????1??2?180???3?108????4???.
4 1
l1
l2
14?????????ABCD??AD?BC??P?DC?????P?DC??????????DAP+?APD=?C?????
A
D
P
B
C
15????????????20cm?????6cm????????.
?
?????(????4??????7???28?) 16?????????ABCD??AB?BC??C=60? ??D-?BAD=10???1?
17?????????1??????????????A????A(?3,2)? ?1?????????????????
?2??ABC???????????B(?5,0)?C(?2,?2)????????ABC? ?3???ABC????6
18????AB//CD?AE???BAD0
AD//BC.
B
A
D
2
C
E
19??????AB?CD???????P??A??C????????????
BD
?????(????3??????9???27?)
20????????ABC??D?BC??????1=?2??3=?4??BAC=63???DAC???.
21??1????ABC????A>90?
?2???ABC???AC????BE???C???????AB??F??BE??G? ?3????????????CBA=30??CGE=70???FBG??AFG???.
22????AD??ABC???????3??4??5??6?EF?BC?E. ?1???ABC?40??ACB=100,??8? ??7? ? ?2???ABC?60??ACB=80,??8? ??7? ? ?3?????8??7???????? ?4?????????.
A2
C
?
F6C
DE
?????????]]??????????????(???)[1]
?????????????
?????????2???20?? 1? ?
12
????
2?2007?12?21????????????22??????????????-4???????????6??????????????????????? ?3??????????????????1?0.00356?(????????) (2)1.8935? (???0.001)
4.????51.5???,????????? ?
5.????????50?,??????20%,???????? 6.??x???2x?3m??1??x??1??m?
7?????????7?30-7?50???????????????? ? 8???5xny2?12x3y2m??????m?n?9????????????a??????b??????c??????????10????????????????
12
???????3????????
?????????2???12??
11????????????????? A??1?(?1)2B. (?1)2? 1C.2?12.?a????,?4a?3a??????( )
A. 4a>3a B. 4a=3a C. 4a<3a D.????
13.??,OC????AOB????,OD?OE????AOC??BOC????, E ????COD?????()?
A.1 B.2C.3D.0 14.??am?an,?????????????( ) ?
A. am?3?an?3 B. 5?am?5?anC. m?nD. ?15.????????()
A.???????????; B.?????????????
C.?????????????,??????;D.???????
16.??????????????,????960?,?????,??????20%,?????20%,????????()
A.???? B.?160? C.?80? D.?80? ?????(?68?)
17.??????????5?? ?1????AB=3cm
?2????AB??C???CD
12
12
D.2??2
C
E
12
O
an
B
am??
?3???ACD????CE
?4????BCD??????DCE????
18??????4???8?? ?1?(?2)3?2?(?4)?
19???????6??5a2?[3a?2(2a?3)?4a2]???a??
20??6?????????????????????????????????????????????????????????15?????????????17?00??????????????18?00???????????9?00??????????? ???????????????????????????????????
?2001?9?11???9??????????????????????????????????????????????????
12
14
?2??103?[(?4)2?(1?32)?2]
21??6??????????????????C?????? ? ??DCB=35??ACB???
? ??ACB=140??DCE???
? ???ACB??DCE??????????????????????
22??6??????O???A????60????4???????B????30????3????1????1????A?B??????????AB????????A??B???????
23??7?????????????????
2x?13
?1?
x?24
??
?
E
D
C
B
O
?
?????????????
?????????????4(2x?1)?1?3(x?2) ?
8x?4?1?3x?6 ? 8x?3x?1?6?4 ?
11x??1?
x??
111
?
?????????????????????????????????????????? ?????0????????????????
2x?14
?
x?13
?2 ??????????
24??7?????????????????48????????????????4??????3???????6???????????????????????????????????
25??8????????????????????????????????????????????16???????????8???????????????????20?????????80??????1?????????????2??????????????????????????????10????????????????a????????b????????c????????????????????????????
26. ?9????????????????????????????????????
?1????1?2?????????????????60%?????????2?????43. 2???
??2????????????
????
?????1.-2?2.10?3.(1)0.036?(2)1.894?4. 5.15?105?5.60?6.-1?7.120?8.1?
3?9.100c+10b+a?10. ?
12x??
32
?
??????11.A?12.D?13.C?14.C?15.C?16.D
?????:17.????(1)(2)(3)??1?(4)?????????1? 18.(1)24?(2)-968
19???=9a2?a?6?-2?
20??1????????20?00??2??????????????2?00??????? ?3????????22?00
21??1??ACB=?ACE+?ECB=90-35+90?2??DCE=?ACD-?ACE=90-?140-90?=40?3??ACB??DCE??
22?????OA?OB??2????AB???5cm??A??B???????5??? 23???????x?
172
24???????x???4?????????
4x48
?
6(x?3)48
?1???x=3???????3????
x16
?20?
x16?8
25?????????x?????26???
???x=960???C?????
?????????????????
?????http://www.850500.com/news/60230.html
?????,??! |
|