第27题: [单项选择]左心功能不全时,下列哪项代偿出现最早() A. 交感神经兴奋 B. 心肌肥厚 C. 血管紧张素分泌增加 D. 心腔扩大 E. 血压增高 参考答案:A
第28题: [单项选择]I'd ____________ the operation unless it is absolutely necessary. A. rather not have B. rather not to have C. not rather had D. rather not having 参考答案:A 答案解析:不定式的省略。如果不是绝对必要的话,我宁愿不做手术。▲副词rather在与 would连用,表示“宁愿”时,后面须接省略to的不定式,即would rather do;变否定时,否定词not应放在不定