X线通过物质时强度减弱 其衰减符合() When X-rays travel through a materail what is the law
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X线通过物质时强度减弱,其衰减符合() When X-rays travel through a materail, what is the law of its attenuation?()
A.线性衰减规律 Linear decreasing
B.指数衰减规律 Exponential decresing
C.指数增长规律 Exponential incresing
D.线性增长规律 Linear increasing

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X 射线线束的宽度
