肝癌放射治疗常采用的定位方法包括() ["A．B超","B．CT","C．MRI","D．根据肝脏的体表标记","E．以上都是"]
甲亢术后产生呼吸困难的原因是_____、_____、_____。
感兴趣内等量像素的信号平均值与噪声标准差之比为() ["A．对比噪声比","B．对比度","C．图像均匀度","D．空间分辨率","E．信噪比"]
与原发性肝癌主要鉴别疾病包括() ["A．肝硬变","B．活动性肝炎","C．肝脓肿","D．肝转移癌","E．肝血管瘤"]
大蛋白质分子的共振频率为() ["A．显著高于拉摩尔共振频率","B．显著低于拉摩尔共振频率","C．接近拉摩尔共振频率","D．亿万Hz","E．6～65Hz"]
甲状腺次全切除术后患者手足抽搐其原因为_____。
