单项选择题
The certificate of nationality （） serves as evidence of the nationality of the ship （） shows the port of registry.
A.neither，nor B.not only，but also C.not，but D.not only， and but
单项选择题 The certificate shall have effect （） all Chinese ports.
单项选择题 The certificate will remain in force （）July lst,2008.
单项选择题 The International Loadline Certificate is a document indicating （）of the various loadlines of the vessel.
