The basic conditions for the formation of X-ray plain film include
A、X-rayhaspenetratingpower;
B、Thereisadifferenceindensityorthicknessofthepenetratedtissue;
C、X-rayfluorescence;
D、PhotosensitiveeffectofX-ray
发布时间：2025-11-22 17:45:19
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答案：X-ray has penetrating power
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