第2题: [单项选择]女性,50岁,因反复呕吐5天入院。血清钠118mmol/L,脉搏120次/分,血压70/50mmHg。应诊断为() A. 轻度缺钠 B. 中度缺钠 C. 重度缺钠 D. 中度缺水 E. 重度缺水 参考答案:C 答案解析:(1)轻度缺钠:患者有疲乏感,头晕、手足麻木、口渴不明显。血清钠在135mmol/L以下,尿中钠减少。(2)中度缺钠:除上述症状外,常有恶心,呕吐,脉搏细速,血压不稳定,视力模糊,尿量少。血清钠在13
第3题: [单项选择]America will never again have as a nation the spirit of adventure as it ______ before the West was settled. A. could B. was C. would D. did 参考答案:D 答案解析:[精解] 题型:词汇题。as作为连词,可引导方式状语从句和表示原因的状语从句,这里是前者,其意为“像……一样”。根据平行结构原则,从句中应填入实义动词had(有)。为了避免重复,用助动词did代替ha