Answer the questions below. Choose NO MORE THAN THREE WORDS from the passage for each answer. Write your answers in boxes 38-40

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问题 Answer the questions below.
Choose NO MORE THAN THREE WORDS from the passage for each answer.
Write your answers in boxes 38-40 on your answer sheet.
What is the name of the method which prevents rubber from deteriorating?

选项

答案vulcanisation

解析 prevents rubber from deteriorating是定位关键词,deteriorating一词的同根词deterioration出现在C段倒数第二句,该句提到橡胶会退化(deterioration),最后一句解释使情况发生改变的是invention of‘vulcanisation’,故答案为vulcanisation。
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