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и˵ȷ( )A.ԼֻγɼԷB...
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1ʱ,֯( )˾Ȼ AŮ Bδ...
δ(B)
ͬѧΪ,ȷѡ( )A. С...
Ҫѧѡ.СڲͲʱܾʹһԿӡDZԼԴı,ֵѧϰ;A;B...
...x= - 2,ԭ̵ĽΪ()A.x=0B.x=1C.x=2D.x=3
,5a-2=13,,a=3,ԭΪ15-x=13,,x=2;ѡC.
...Ρ A.a B.b.d C.c D.a.b.c.d...
C 漰Թ,ѧԻۺͷɢ⡣Ͱ·ĸı䶼ѭԭ ĺ...
Աⲻ뻢Ѩ ɵû ...
仰ؼǷ,Ҳ˵һ:뻢Ѩ,͵ò.Ļ,ϵ,ǰͺ...
ABCDһδ,˭...
::A,C,DĻ,ì;B,A,CĻ,ì;C,A,B,CĻ,DĻ,;...
...ͼʾʵ,һܺ:ABδ...
(1)ֲʹ.:. (2)ˮȻܹˮ,Χеˮ,ʹˮӴ,ʵ...
2.2и,ڱҵʲΧ() ѡ2.2...
ABD. ̶ʲַתƸ뷽,Լ뱾ҵʲ; Ӫʽ豸,ղδת,Ҳ뱾ҵʲ ίмӹ,ʱ...
СѧΧΰͤ,ÿо...
еʵʩǾУܱΰ,ᱣ,ѡC.