与CT空间分辨率无关的是
A．像素尺寸B．辐射剂量C．采样频率D．探测器孔径E．重建算法
参考答案：B
解析：辐射剂量与CT的空间分辨率无关。
A neighbour helped to keep our dog. It______while we were on holiday. [ ]
A. was taken care
B. took care of
C. is taken care of
D. was taken care of
必须清理高空作业下方场地，禁止堆放杂物。
