—Are there many classrooms in your school?    — ________. [ ]

A. Yes, there're

B. Yes, they are

C. No, there aren't

D. No, they aren't

关于妊娠合并心脏病，下列说法正确的是；()

A．心功能Ⅲ级可继续妊娠

B．听诊闻及舒张期杂音，不应确诊为心脏病

C．心脏病孕妇的主要死亡原因是产后出血

D．对阵发性室上性心动过速的孕妇，可确诊为器质性心脏病

E．心脏病孕妇的胎儿预后比正常孕妇的胎儿差