阅读短文，回答题：

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 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

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参考答案

依据是文章第1段第3行的内容。

1 According to the researchers, cream sours faster than butter because bacteria __________

A．are more evenly distributed in cream

B．multiply more easily in cream than in butter

C．live on less fat in cream than in butter

D．produce less waste in cream than in butter

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2 According to Brocklehurst, we can keep cream fresh by__________

A．removing its fat

B．killing the bacteria

C．reducing its water content

D．altering its structure

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3 The word "colonies"(Line 2, Para.3) refers to__________

A．tiny globules

B．watery regions

C．bacteria communities

D．little compartments

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