第15题: [单项选择]Passage Two Questions 29 to 31 are based on the passage you have just heard. A. Because he began to go deaf. B. Because he wanted to read books at night. C. Because he wanted to make money on it. D. Because he ran out of candles. 参考答案:B 答案解析:[听力原文] Why did Edison invent the light bulb
第18题: [单项选择]男性,72岁,既往高血压、高脂血症,因劳累后突感剧烈胸痛,继之进行性呼吸困难1h入院。体检:血压130/80mmHg,急性病容,呼吸30/min,心率120/min,律齐,两肺底可闻及细湿啰音。心电图:窦性心动过速,V呈QS型,V呈Qr型伴ST单向抬高,T波直立。其紧急处理中哪一项是错误的() A. 利尿扩血管 B. 紧急溶栓 C. 静滴丹参 D. 静滴异丙肾上腺素 E. 静滴极化液 参考答案:D
第19题: [多项选择]排盐苛化的两个机理是() A. Na2CO3的溶解度随苛性碱浓度升高而下降 B. Na2CO3浓度越高,其粘度越大 C. Na2CO3的溶解度随温度升高而增大 D. Na2CO3溶液的沸点随浓度升高而升高。 参考答案:A, C