第20题: [单项选择]What are these people doing A. They are watching TV. B. They are listening to the radio. C. They are swimming in the channel. D. They are changing their news program. 参考答案:A 答案解析:[听力原文] M: Will you please change this channel I can’t stand this program. W: If you wait a mi
第30题: [单项选择]作为慢性肾衰竭与急性肾衰竭鉴别依据的是()。 A. 血BUN/Cr>20 B. 蛋白尿与低蛋白血症较明显 C. 严重贫血 D. 严重低钙血症与高磷血症 E. 肾脏体积缩小 参考答案:E 答案解析:急慢性肾衰竭均因导致机体代谢紊乱而高BUN、低钙血症与高磷血症,并由于原发病作用存在严重贫血和蛋白尿及低蛋白血症,而急性肾衰竭一般不会出现肾脏体积缩小,可作为鉴别点。