（）should ensure that adequate measures are taken to prevent alcohol and drugs from impairing the ability of watchkeeping personnel.<br>A:The quarantine officers<br>B:Administrations<br>C:The immigration officers<br>D:The customs officers

（）should ensure that adequate measures are taken to prevent alcohol and drugs from impairing the ability of watchkeeping personnel.
A:The quarantine officers
B:Administrations
C:The immigration officers
D:The customs officers

出自：海船船员证

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