life in a new country can be difficult，it can broadcast a person's view of the world．

A．If    B．Although    C Because D While

新生儿肺透明膜病的典型X线表现是()

A．条状高密度影

B．肺纹理增重

C．三角形致密影

D．肺纹理模糊

E．支气管充气征