关于电子对效应的发生几率正确的是(). ["与物质的原子序数的平方成正比","与物质的原子序数的平方成反比","与入射光子的能量成正比","与入射光子的波长成正比","与单位体积内的原子个数成反比"]
鼻与鼻窦X摄片,以下哪种位置显示上颌窦最佳() ["标准正位","标准侧位","柯氏位","瓦氏位","眼眶斜位"]
支气管哮喘的发病原因有() ["遗传因素","免疫状态","变应原","感染","药物"]
关于康普顿效应的发生几率错误的是(). ["与物质的原子序数成正比","与入射光子的能量成反比","与入射光子的波长成正比","与入射光子的频率成反比","与管电流成正比"]
胆脂瘤是慢性化脓性中耳炎的并发症之一,其X线典型表现为() ["硬化型乳突","乳突内圆形、边界清楚、边缘硬化之透亮区","乳突内不规则形、边界模糊不清之透亮区","不规则状虫蚀样骨质破坏","片状不规则骨质硬化"]
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