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下列计算中,正确的是A.|-2|=-2B.C.a3•a2=a5D.2x2-x=
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下列计算中,正确的是( )
A.|-2|=-2
B.
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEQAAAASCAYAAADixHhYAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
C.a
3•a
2=a
5D.2x
2-x=
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-
(2008•湛江)下列计算中,正确的是( )
A.|-2|=-2
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEQAAAASCAYAAADixHhYAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAGqSURBVFhH7Vc5EoQgEORdBjzHnJ8Y+xBTHrIB
T5l18GCQw+HK3CqrdlWmm6anYQVEPkII4FyxsW/3OHXxnd4fLm4UeQSha4Ija+dE5OJ+gjxU/ASp
FcSs0uWKXMFUNnlgXa261H2jE+CaFeSVlUrfw5kO0aAaRKBkPWJI6iazYyBBQg7HscPwJYh9Qeh8
DtwLlifIvooPnm8LknxOiRmtPadZF3YS/knAXwjj4WpVJIiBVV7bsAJnrjpNsmmP7dNL+Wc2pBz0
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HGXaAjYuCLZlezvWHsxodgnY5tP2s9t6som9C8J1CLO2Vq4Nu7QKE/fGIjkitm2z95dJwLT87Pd8
n/PJc2rj6nj6dtjROLgkBOymEW67VtXDJcFZgQQn1xzeSidqx0O5Y+uk5kQPg+QMYudOic/7Q3QJ
949Qib1H1s7xKMX1BPktE4hpGSLIyNo5QUpxg10GFR3hECQ9svabS7hzqth2SxolfJdLrA2lHvcP
MyHoIl036L8AAAAASUVORK5CYII=
)
C.a3•a2=a5
D.2x2-x=
-
(2008•湛江)下列计算中,正确的是( )
A.|-2|=-2
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEQAAAASCAYAAADixHhYAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
C.a3•a2=a5
D.2x2-x=
-
下列计算中,正确的是( )
A.|-2|=-2
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEQAAAASCAYAAADixHhYAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
C.a3•a2=a5
D.2x2-x=
-
(2008•湛江)下列计算中,正确的是( )
A.|-2|=-2
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEQAAAASCAYAAADixHhYAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
C.a3•a2=a5
D.2x2-x=
-
(2008•湛江)下列计算中,正确的是( )
A.|-2|=-2
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEQAAAASCAYAAADixHhYAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
C.a3•a2=a5
D.2x2-x=
-
下列计算中,正确的是( )
A.|-2|=-2
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEQAAAASCAYAAADixHhYAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
C.a3•a2=a5
D.2x2-x=
-
下列计算中,正确的是( )
A.|-2|=-2
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEQAAAASCAYAAADixHhYAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
C.a3•a2=a5
D.2x2-x=
-
下列计算中,正确的是( )
A.|-2|=-2
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEQAAAASCAYAAADixHhYAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
C.a3•a2=a5
D.2x2-x=
-
(2008•湛江)下列计算中,正确的是( )
A.|-2|=-2
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEQAAAASCAYAAADixHhYAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
C.a3•a2=a5
D.2x2-x=
-
下列计算中,正确的是( )
A.|-2|=-2
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEQAAAASCAYAAADixHhYAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
C.a3•a2=a5
D.2x2-x=