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【单选题】
音程中的两个音下面的音叫____。
A.
B.
根音
C.
上方音
D.
下方音
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【简答题】根据句意选择正确的单词。 1. She likes drawing and math. She can design cars. She is an ____________. [     ] A. engineer B. salesperson C. cleaner 2. He enjoys math. He helps the bank use their money well. He is ...
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【单选题】下列微生物中属于原核细胞型微生物的有( )
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【单选题】特种作业人员需年满（）周岁。
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B.
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C.
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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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【简答题】先化简，再求值，（3x+2）（3x﹣2）﹣5x（x﹣1）﹣（2x﹣1） 2 ，其中 ．
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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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相关题目：
【单选题】She is not very good at_gardens.
A.
to design
B.
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C.
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【简答题】已知：2x=4 y+1 ，27y=3 x﹣1 ，求x﹣y的值
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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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【简答题】先化简，再求值，（3x+2）（3x﹣2）﹣5x（x﹣1）﹣（2x﹣1） 2 ，其中 ．
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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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