属于胃癌癌前病变的有() ["A．残胃","B．胃溃疡","C．大肠型肠上皮增生","D．腺瘤性胃息肉","E．异型上皮增生"]
婴幼儿颅内压增高的主要临床表现是_____。
下述哪些为影响MR信号强度的参数() ["A．组织参数","B．测量参数","C．系统参数","D．以上全是","E．以上全不是"]
属于结肠癌的晚期症状的有() ["A．黄疸","B．腹水","C．脾肿大","D．锁骨上淋巴结肿大","E．浮肿"]
MR成像中，哪些与图像的对比度有关() ["A．脉冲序列","B．脉冲参数","C．造影剂","D．以上均是","E．以上均不是"]
小脑幕裂孔疝发生后，病情常急转直下，最主要的原因是_____。
