函數(shù)的圖像                              （   ）

  A 關(guān)于點(diǎn)對(duì)稱       B 關(guān)于直線對(duì)稱

  C 關(guān)于點(diǎn)對(duì)稱       D 關(guān)于直線對(duì)稱

點(diǎn)關(guān)于直線對(duì)稱的點(diǎn)是 (      )

    A．            B．           C．           D．

若圓關(guān)于直線對(duì)稱，則由點(diǎn)向圓所作的切線長(zhǎng)的最小值是(     )

A.             B.                     C.                   D.

函數(shù)的圖象

A.關(guān)于點(diǎn)對(duì)稱                B.關(guān)于點(diǎn)對(duì)稱

C.關(guān)于直線對(duì)稱               D.關(guān)于直線對(duì)稱