第4题: [单项选择]单侧喉返神经损伤() A. 声音嘶哑 B. 音调降低 C. 手足抽搐 D. 呛咳误咽 E. 呼吸困难和窒息 参考答案:A 答案解析:1.声带的运动由喉返神经支配,双侧喉返神经损伤可致两侧声带麻痹,引起失音、呼吸困难甚至窒息。 2.单侧损伤可引起声音嘶哑。 3.若内支损伤则使喉黏膜感觉丧失,易发生呛咳误咽。 4.喉上神经外支损伤可使
第12题: [单项选择]People in the United States in the nineteenth century were haunted by the prospect that unprecedented change in the nation' s economy would bring about social chaos. A. occupied B. overwhelmed C. obliged D. obsessed 参考答案:D 答案解析:haunt萦绕在心头,缠绕。obsess使缠绕,困扰。overwhelm制服,压倒。occupy占据,占用。
第33题: [单项选择]One and a half years______ passed. A. are B. were C. have D. has 参考答案:D 答案解析:语法结构题。考查主谓一致。当时间、距离、金钱、重量等作主语时,一般看做整体,谓语动词用单数形式。答案为D。句意:一年半时间过去了。