内容正文:
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1. - 2020 ~ffl&J&:li!:
I 1
A. --- B. - - C. 2020 0 . - 2020
2020 2020
2. ~ 11L • Eti Jt 1' ffl fol~ ,1, iE n i*mlit ~ 11. fiiT i*, JQ 'E:: !l'li.111a11u1
A.~
C. il5
B. 1*
0 . ~
5. "'FJJJ-&ffl•<I>. !1i:lltfflWt19£
A. - 12 !-j(- 1)2
C. - 1-21.!:.i - (- 2)
( ;II 3111)
8. (- 3)' ~ - 33
0. - ½ -2' ·(2),
3 3
6. "'FJIJ~i.t.: - ( -3) ; - l - 31; -3 2 ; - (- 3)7 , ttJJffi~;l<J~J&: ~ fl
A. 31' B. 2 1' C. 1 1' D. 01'
7 . "FJIJit.iEl\l~~
A. 7ab - (-3ab)=l0
..
l 2 2 2 C. X y- X y = - X y
8. ~mm*r2~~*r5~•~
A. 61' B. 41'
9. "'FJIJl:t$Jl*,J,jE!(IB()~
A. - (-21)< +(-2 1)
5 4
C. -- <--
6 5
B. 2(a +2b)=2a+2b
C. 31'
B. -1-7¾1=-(-7¾)
0 . - l- 10~>8¾
0. 21'
L &/\I\ /Slv ······
CM 10 Ill
A. 214 B. 215 C. 216 0 . 217
=, !A~ (ij,J,/ffi3~ , :lt 18~)
11. H .ll: 2020 i\,'. 1 .1=n:tmmai1A o i(:)1i 625 n. •~ 625 nmft~it 1tn.1~~;1<J
12 . ffl - 1' ,ljZ- i1ii ~ l',! 00 tt , lllt1L 1* • Ill ~ 5X 11!11' J1. fiiT i* , l',! ilii - liUI\ Ill B(J
:li!: _ __ _
13 . -J1J.:k.$ -lx: m *• IU~tll n *~~llilM-1-*;i<J P *B(Jijf;JaJ , fflftt&:i.t.e~-eili:l
ijf;JaJJiJrm~tt-tieJ~ _ _ __ .tll .
14. E.m: lxl=2 , IY-ll=S , Ji xy <O . JIJx -y= _ _ _ _
16 . ~ itlff-m~ a 1-!lHiL, !ailifii.flll:ttil-m~--t-§m. ffl~r-;f-M n tlfa\J§m
I! _ __ _
=., M1f9, c11SiflJ&4~ , 18116~, 19 118~ , ;J:1;22~>
• 17. (1)it $ , ( I ) 15 - (1 -(-10 - 4)}
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5
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19 . $'i:'ltral , -ill* ii· 2(a 1b+ ab1 )-3(a2b-l) - 2a b1 - 2 ,
1t'P a = - 2 . h = - \
11!1, - (20 Ill, 2 1 H* 8 ~ . :Jt 16 ~ )
20. tE 111ud1..tt1-tt: 1-,iJ s -t-111!! , ~~ 1::: mnv,i.. ,J, ill* a\J lfiiF!'=tlt~JE*.
1
4.5 f - (-3) f 0 , - - I - l-3.51
2
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-5 -4 -3 -2 -1 0 1 2 3 4 5
2 1. ¥-ti:lil U#lt!! 1000m, fcl'$k1:t, ffil:il:~iUlt . :it'P&~mlt!! a ffi , ••11u&1:ta~
ffliia\J 6 mi:E~ b m.
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