产生低能X射线的条件不包括（）The conditions for producing low energy X-rays do not include（）

产生低能X射线的条件不包括（）The conditions for producing low energy X-rays do not include（）

A.短曝光时间Short exposure time

B.低原子序数靶物质Target material with small atomic number

C.低管电压Small tube potential

D.钼靶Molybdenum target

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