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【单选题】
已知是f(x)的一个原函数是 ,则不定积分 dx为( )A.
-2 +C
B.
2 +C
C.
2x +C
D.
-2x +C
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【简答题】在Windows 2000下，对任务栏的错误描述是______。 A) 任务栏的位置、大小均可以改变 B) 任务栏不可隐蔽 C) 任务栏的尾端可以添加图标 D) 任务栏内显示的是已打开文档或已运行程序的标题
【简答题】在Windows中对任务栏的错误描述是（ ）。
【简答题】在“___”模式中，属于任务活动的有： 1) 在任务前阶段激活相关图式(背景知识)及已掌握的语言结构及词汇;2)在任务中阶段分组进行真实性的交际活动，之后作准备并把结果汇报。 A.强交际派 B.弱交际派 C.强任务派 D.弱任务派
【单选题】How did the researchers ensu re that their findings are valid?
A.
By attaching equal importance to all possible variables examined.
B.
By collecting as many typical samples as were necessary.
C.
By preventing them from being affected by factors not under study.
D.
By focusing on the family background of children being studied.
【简答题】How does a firm ensure the responsibility to environment? Please give two examples.
【单选题】How does the firm find out Andrew had AIDS?
A.
They see his medical records.
B.
He has a lesion on his forehead.
C.
They overhear him discussing it on the phone with his doctor.
D.
He is tired and is losing a lot of weight.
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