第6题: [单项选择]Regular meals and exercise______our health. [A] are important for [B] are important to [C] is important to 参考答案:A 答案解析:考查主谓一致和同定搭配。首先,由and连接两个不同的事物作主语时,句子谓语动词用复数形式;其次,be important for后跟名词,be important to后跟动词原形。结合这两个方面可知
第19题: [单项选择]关于PT测定下列说法错误的是()。 A. PT测定是反映外源凝血系统最常用的筛选试验 B. PT的参考值为11~14秒,超过正常3秒为异常 C. PT测定时0.109M枸橼酸钠与血液的比例是1:9 D. 口服避孕药可使PT延长 E. 肝脏疾病及维生素K缺乏症时PT延长 参考答案:D 答案解析:PT延长主要见于:①先天性因子Ⅱ、V、Ⅶ、X减少及纤维蛋白原的缺乏。②获得性凝血因子缺乏,如DIC、原发性纤溶亢进症、肝病的阻塞性黄疸和维生素的缺乏。③血循环中抗凝物质增多等。
第33题: [单项选择]Which distance did they talk about [A] From school to hospital. [B] From school to the park. [C] From home to the park. 参考答案:B 答案解析:[听力原文] F: How far is it from our school to the park M: It’s about 250 meters.