单项选择题

According to Brocklehurst, we can keep cream fresh by______

A.removing its fat
B.killing the
C.reducing its water content
D.altering its structure
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单项选择题
The underlined word colonies in Paragraph 4 refers to______
A.tiny globules
B.watery regions
C.bacteria communities
D.little compartments
单项选择题
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 butut
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
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