丁香花萼的特征是

A．先端四裂，肥厚

B．先端五裂，肥厚

C．先端四裂，膜质

D．先端五裂，膜质

E．先端六裂，裂片三角形

A vessel sailing from Liverpool to New York puts into Boston，Mass. for emergency repairs. If no inward foreign cargo is to be discharged at that port，which of the following documents is required?（）

A.Custom Manifest

B.Inward Foreign Manifest

C.Pro Forma Manifest

D.Traveling Manifest