从事接触直接入口食品工作的食品生产人员应当()进行健康检查,取得健康证明后方可上岗工作
A、每半年B
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Thefarmingmethodshavebeen________improvedwiththeinventionofthenewmachine.
ThelargestandsmalleststatesoftheUnitedStatesare________.
英语翻译:Vatican
InCanadathefederalgovernmentshavealwaysbeenformedby________.
句子写作:TodayatschoolMrMoorebroughtinhispetrabbit.Heshowedittotheclass.