X线穿过均匀物质时,与其衰减无关的因素是()
A.物质的衰减系数
B.X线经过的距离
C.X线发出的强度
D.物质的厚度
E.物质的面积
参考答案:E
As a teacher rich in experience, he knows how to his ideas to these new students in a limited period of time.
A.convey
B.educate
C.pass
D.convince
可确诊肺结核的检查是
A.血沉B.空腹胃液抗酸杆菌培养C.纤维支气管镜直接观察D.血清结核抗体E.肺部CT检查