1 0308 托福试题 阅读（55minu tes） Qu estion 1-11 If food is allowed to stand for some time, it putrefies .When the putrefied material is examined microscopically ,it is found to be teeming with bacteria. Where do these bacteria come from , since they are not seen in fresh food? Even until t...

时间:2025-02-08 20:12栏目:行业资料

0308 托福试题阅读（ 55minutes ）Question 1 -11If food is allowed to stand for some time, it putrefies .When the putrefied materialis examined microscopically ,it is found to be teeming with bacteria. Where do thesebacteria come from , since they are not seen in fresh food? Even until the mid...

时间:2024-11-21 03:47栏目:行业资料