题型:问答题 简答题 She stepped on my foot _______, not _______, which made me angry.A.by chance; on purposeB.on purpose; by chanceC.for purpose; by chanceD.by chance; for purpose 查看答案
题型:问答题 简答题 现场采集的样品包括().A.可疑食品的剩余部分.半成品和原料B.生产设备上的残留物C.食品加工工具.用具.食品容器.抹布.操作人员的双手D.中毒患者大便.血液.呕吐物.尿液,从业人员粪便.咽拭子等 查看答案