题目

Sun Yue, a basketball star, said goodbye to CBA for NBA and is ready to ________ in a new world of basketball. A．take off  B．get off  C．turn off      D．give off 答案：A把函数图象上每一点的横坐标缩小为原来的（纵坐标不变），再把所得的图象向左平移个单位，所得图象的解析式为：________．