已知函數(shù)f(x)的定義域?yàn)閇a，b]，集合A={(x，y)|y=f(x)(xÎ[a，b])}，B={(x，y)|x=1}，那么集合A∩B中所含元素的個數(shù)是

1. A.
   0
2. B.
   1
3. C.
   0或1
4. D.
   1或2

已知函數(shù)f(x)的定義域?yàn)閇a，b]，函數(shù)y＝f(x)的圖像如下圖所示，則函數(shù)f(|x|)的圖像大致是                                                                            (　　)

 已知函數(shù)f (x)的定義域?yàn)閇a，b]，函數(shù)f (x)的圖象如右圖所示，

則函數(shù)f (| x |)的圖象是(   )

      A．             B.               C.                D.

已知函數(shù)f(x)的定義域?yàn)?/FONT>[a，b]，集合A={(x，y)|y=f(x)，xÎ[a，b]}，B={(x，y)|x=1}，那么集合A∩B中所含元素的個數(shù)是