第19题: [单项选择]关于脑外肿瘤的MRI定位诊断,下列哪项不对() A. 肿瘤以宽基底紧贴在颅骨内侧面 B. 邻近脑白质受压、向脑室方向移位 C. 有时可出现"假包膜"征象 D. 肿瘤周围有显著脑水肿征象 E. 邻近肿瘤的蛛网膜下腔增宽 参考答案:D 答案解析:脑外肿瘤常出现以下表现:①肿瘤有一宽基底部,紧贴于颅骨的内面;②邻近蛛网膜下腔增宽,或在脑沟、脑池内有异常信号。③邻近脑白质受挤压且向脑室方向移位。④肿瘤的脑室缘附近有裂隙状脑积液信号。
第21题: [单项选择]It is a market which sales value might be more than 10 billion yuan.( ) A. a market with a sales value that might be B. a market which might be sales value C. a market with sale value might be D. market with sales might be a value 参考答案:A 答案解析: