- 问题详情:Imaginegoingcampingforoveraweekwithseveralofyourclosefriends.Youwouldmakesureyouhaveplentyoffoodandthingstocookandeatwith.Thefoodwouldhavetobestoredproperlytopreventspoilage(变质).Afterfinishingyourmeal,orattheendofyourcampingtrip,youwouldthe...
- 17405