单项选择题
A.becomes null and void B.remains effective C.is to be extended D.is to renewed
Maritime Declaration of Health is to be rendered to （） ...
单项选择题Maritime Declaration of Health is to be rendered to （） by the master of ship arriving from port outside the territory．
A.Immigration Officer B.Customs Officer C.Quarantine Officer D.Ship's Agent
Masters of ocean-going ships must keep in mind that （） ...
单项选择题Masters of ocean-going ships must keep in mind that （） should be hoisted immediately if any quarantinable diseases be found．
A.the national flag B.the quarantine signal C.the Certificate of Pratique D.the navigational light
I shall apply （） the extension of my Deratization Certi...
单项选择题I shall apply （） the extension of my Deratization Certificate．
A.to B.for C.of D.on
