5.已知不等式<1成立的充分不必要条件是,则的取值范围是 .
4.不等式||>1的解集是
A.{x|x>1} B.{x|x<}
C.{x|<x<1} D.{x|x<0,或0<x< }
3.已知函数是定义在R上的奇函数,,当成立,则不等式的解集是
A. B. C. D.
2.在R上定义一种运算:xy = x (1– y).若不等式(x– a)( x + a)<1对任意实数x成立,则( )
A.– B.0<a<2 C.–1<a<1 D.
1.函数,若时,恒成立,则实数m的取值范围是( )
A. B. C. D.
第二节:写作(满分30分)
仔细观察下面四幅图,请据此以“The Hope Project (希望工程)”为题写一篇120-150词的短文。注意以下要点:
1.讲述西部山区孩子的教育状况。
2.写出论据,说明“希望工程”的重要性。
3.提出相应的建议。
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