出现口蹄疫疫情后，对金属设施设备，可采取（）等方式消毒。
A、火焰、高压
B、火焰、熏蒸
C、熏蒸、高压
D、高压、喷雾
参考答案：B
---I can’t find Mr. Brown. Where did you meet him this morning?
---It was in the hotel _______he stayed.
A that B which C where D when
在正常生产时处理LT-306（差变）时应注意什么？
