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  3. How did the scientists do the test? What does the word "reduce" mean in the last sentence?

How did the scientists do the test? What does the word "reduce" mean in the last sentence?

admin2009-08-17  31
问题 How did the scientists do the test?
What does the word "reduce" mean in the last sentence?
选项 A、增加
B、放弃
C、减少
答案C
解析 由本段第三句可推断出答案。
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