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【单选题】
Which era did dominate the 1830s?
A.
The Lincoln’s Era
B.
The Jacksonian Era
C.
The Jeffersonian Era
D.
The Harrison’s Era
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【简答题】A．She was too busy to remember if she had returned them. B．She didn't return them in fact. C．She gave them to the landlord to return. D．She did return them but somehow the library made a mistake.
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【单选题】下列各式中,去括号或添括号正确的是( ) A . a 2 -( 2a - b+c ) =a 2 - 2a - b+c B . - 2x - t - a+1= -( 2x - t ) + ( a - 1 ) C . 3x - [5x -( 2x - 1 ) ]=3x - 5x - 2x+1 D . a - 3x+2y - 1=a+ (- 3x+2y - 1 )
A.
a 2 ﹣（ 2a ﹣ b+c ） =a 2 ﹣ 2a ﹣ b+c
B.
﹣ 2x ﹣ t ﹣ a+1= ﹣（ 2x ﹣ t ） + （ a ﹣ 1 ）
C.
3x ﹣ [5x ﹣（ 2x ﹣ 1 ） ]=3x ﹣ 5x ﹣ 2x+1
D.
a ﹣ 3x+2y ﹣ 1=a+ （﹣ 3x+2y ﹣ 1 ）
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【单选题】特种作业人员年满(-----)周岁。
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【简答题】（1）计算：（1）（﹣4） 3 ﹣4×（﹣ ） 2 （2）化简：2x﹣（3x﹣ ）+[5x﹣ （x﹣2）] （3）解方程：y﹣ = y﹣2．
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【简答题】A．She was too busy to remember if she had returned them. B．She didn't return them in fact. C．She gave them to the landlord to return. D．She did return them but somehow the library made a mistake.
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【单选题】下列各式中,去括号或添括号正确的是( ) A . a 2 -( 2a - b+c ) =a 2 - 2a - b+c B . - 2x - t - a+1= -( 2x - t ) + ( a - 1 ) C . 3x - [5x -( 2x - 1 ) ]=3x - 5x - 2x+1 D . a - 3x+2y - 1=a+ (- 3x+2y - 1 )
A.
a 2 ﹣（ 2a ﹣ b+c ） =a 2 ﹣ 2a ﹣ b+c
B.
﹣ 2x ﹣ t ﹣ a+1= ﹣（ 2x ﹣ t ） + （ a ﹣ 1 ）
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3x ﹣ [5x ﹣（ 2x ﹣ 1 ） ]=3x ﹣ 5x ﹣ 2x+1
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a ﹣ 3x+2y ﹣ 1=a+ （﹣ 3x+2y ﹣ 1 ）
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【单选题】特种作业人员年满(-----)周岁。
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16
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【简答题】（1）计算：（1）（﹣4） 3 ﹣4×（﹣ ） 2 （2）化简：2x﹣（3x﹣ ）+[5x﹣ （x﹣2）] （3）解方程：y﹣ = y﹣2．
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