题目

 —It was________ of Jack to turn off the radio when I was sleeping in the bedroom. —So he was. A．reasonable        B．curious                 C．considerate            D．generous 答案：C将函数的图象按向量平移，则平移后的函数图象（    ）．Ａ．关于点对称          Ｂ．关于直线对称Ｃ．关于点对称             Ｄ．关于直线对称