关于肺动脉高压X线片检查，叙述错误的是（）

A.表现为中心肺动脉的扩张和周围肺纹理的减少

B.可有右心房、右心室的扩大

C.可帮助排除左心功能异常导致的肺动脉高压

D.可帮助排除肺静脉梗阻性疾病

E.与肺动脉高压的严重程度不一致

All portable fine extinguishers must be capable of being（）.

A.carried by hand to a fire

B.carried or rolled to a fire

C.recharged in the field

D.used on class B fires