【判断题】当边际收益小于边际成本时,垄断厂商会减少产量( )
【多选题】泛化关系的数据库设计时,下列说法正确的是
【单选题】下列关于胸膜腔的说法错误的是:
C.
胸液的形成主要取决于毛细血管和胸膜腔内的压力梯度
E.
任何因素导致胸水的形成过快或吸收过缓即可形成胸腔积液
【单选题】下列关于胸腔积液的说法错误的是()
A.
LDH>500U/L常提示恶性肿瘤或并发细菌感染
C.
结核性胸膜炎胸水中γ干扰素增高,其敏感性和特异性高
【单选题】消食健胃、活血化淤,尤以消肉食见长的药物是( )
【单选题】听力原文:M: It sounds like a challenging position. W: Yes, it is. How do you feel about a position with a lot of amine travel involved? M: I'd like nothing better. W: What experience do you have with comp...
C.
A teacher and a student.
D.
A prospective employer and an employee.