单项选择题
A.内含X线管B.内含滤过片C.内含整流器D.内含高压变压器E.安装于支架上端
A.黏膜相B.充盈相C.涂布相D.加压相E.气钡双对比相
A.12L/cmB.24L/cmC.36L/cmD.48L/cmE.60L/cm
A.0.015mm铑B.0.025mm铑C.0.035mm铑D.0.045mm铑E.0.055mm铑
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