2022年12月四级真题与答案6.docx

2022年年12月四级真题与答案6
Why does cream go bad faster than butter? Some researchers think they the answer，and it comes down tocream，the bacteria are free to grow throughout the mixture，“he the situation is revers ed，the bacteria are locked away in compartments (密封仓) buried dee p in the sea of in this way，individual colonies cannot spread and rapidly run out of also slowly poison themselves with their wast e products.“In butter，you get a self - limiting system which stops the bacteri a growing，“says researchers are already working with food com panies keen to see if their products can be made resistant to bacterial attack t hrough alterations to the food”s believes it will be pos sible to make the emulsions used in salad cream，for instance，more like that in key will be to do this while keeping the salad cream liquid and not turning it into a solid lump.


　　36. The significance of Brocklehurst”s research is that ______ .
　　A) it suggested a way to keep some foods fresh without preservatives
　　B) it discovered tiny globules in both cream and butter
　　C) it revealed the secret of how bacteria multiply in cream and butter
　　D) it found that cream and butter share the same chemical composition