"_________should ensure that adequate measures are taken to prevent alcohol and drugs from impairing the ability of watch keeping personnel
A.The quarantine officers
B.Administrations
C.the immigration officers
D.the customs officers
正确答案是B
"_________should ensure that adequate measures are taken to prevent alcohol and drugs from impairing the ability of watch keeping personnel
A.The quarantine officers
B.Administrations
C.the immigration officers
D.the customs officers
正确答案是B