The number of the students in our grade ________about six _______,

of them are girls.

A．are, hundreds, two- thirds

B．is, hundred, two- third

C．is, hundred, two thirds.

D．are, hundreds, two third

某慢性肺心病患者，受凉后咳喘加重，咳脓痰，伴发热烦躁，发绀加重，次日神志模糊、嗜睡，血压110/60mmHg，无病理反射，最可能的诊断是（）

A.肺心病并急性脑血管病

B.肺心病并肺性脑病

C.肺心病并感染性休克

D.肺心病并DIC

E.肺心病并消化道出血