下列哪项不属于CT扫描成像基本步骤()
A．产生X线
B．采集数据
C．重建图像
D．显示图像
E．图像后处理
参考答案：E
Lily is a good student, she _______ late for school.[ ]
A is hardly ever
B. isn't never
C. is often
D. is always
