第24题: [单项选择]第三心音特点() A. 音调低,强度弱,性质低钝,持续时间短,通常只在儿童和青、少年可听到 B. 音调较低,强度较响,性质较钝,历时较长,与心尖搏动同时出现,心尖部听诊最清晰 C. 音调较高,强度较第一心音低,性质较第一心音清脆,在心尖搏动之后出现,心底部听诊最清楚 D. 低调、沉浊、很弱,心尖部及其内侧较明显 E. 音调高、历时短促而响亮、清脆,呈拍击样,在心尖内侧较清楚 参考答案:A
第27题: [单项选择]Questions 19 to 22 are based on the conversation you have just heard. A. She hasn’t seen her friend for years. B. She worries about her friend’s health. C. She worries her daughter’s health. D. She worries about her daughter’s study 参考答案:D 答案解析:[听力原文] 19-22 M: Hi, Sally! It’s been ages since we met last time. How are you getting along with