第27题: [单项选择]A. To recruit swimmers from other sports. B. To explain the high drop-out rate in the sport of competitive swimming. C. To raise funds for a swimming competition. D. To gain support from parents for scholarship contributions. 参考答案:B 答案解析:[听力原文] Competitive swimming is one of the most demanding parts of all sports. Since all of yo
第28题: [单项选择]我国的()地区是咸潮入侵最严重的地区。 A. 黄河三角洲和长江三角洲 B. 长江三角洲和珠江三角洲 C. 黄河三角洲和珠江三角洲 D. 上海和浙江 参考答案:B
第29题: [单项选择]诊断肥厚型心肌病最常用的辅助检查是() A. 心电图 B. 超声心动图 C. 冠状动脉造影 D. 心内膜心肌活检 E. 胸部X检查 参考答案:B 答案解析:对于肥厚型心肌病,超声心动图是临床上主要诊断手段,可显示室间隔的非对称性肥厚,舒张期室间隔的厚度与后壁之比≥1:3,间隔运动低下