第4题: [单项选择]KerleyB线() A. 肺动脉高压 B. 间质性肺水肿 C. 肺泡性肺水肿 D. 肺栓塞 E. 动脉导管未闭 参考答案:B 答案解析:间质性肺水肿:X线胸片出现肺泡间隔水肿增厚形成间隔线--KerleyB线,其为长约2~3cm、宽约1~3mm的水平线,多位于肋骨角区。肺泡性肺水肿:X线胸片出现一侧或两侧肺门广泛性分布的斑片状阴影,常
第5题: [单项选择]暖锋锋线两侧风向分布为()。 A. 北半球锋前SW风、锋后NW风 B. 南半球锋前SW风、锋后NW风 C. 南半球锋前NE风、锋后NW风 D. 北半球锋前SW风、锋后SE风 参考答案:C
A. it is still being tried out B. drivers still have their doubts C. it increases the cost of car production D. carmakers are not sure if it is necessary 参考答案:C 答案解析:细节题。根据文章最后一段第二句话“But the carmakers haven't decided if they will put it into production because it wo