注入造影剂后，血液对X射线的衰减能力（）The ability of blood to attenuate X-rays after injection of contrast agent（）

注入造影剂后，血液对X射线的衰减能力（）The ability of blood to attenuate X-rays after injection of contrast agent（）

A.增加Increase

B.减少decrease

C.不变unchange

D.视造影剂的浓度而定Depending on the concentration of the contrast agent

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