提示胎肺成熟()

A．羊水肌酐的测定

B．羊水细胞脂肪染色、

C．羊水卵磷脂/鞘磷脂比值的测定

D．羊水胆红素的测定

E．羊水雌三醇的测定

It looks like a terrible tiger but actually, () of pressed paper, it softens when damp and is washed away in a heavy rain.

A. made

B. having been made

C. to be made

D. being made