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Complete the summary using the list of words, A-H, below.Write the correct lett
Complete the summary using the list of words, A-H, below.Write the correct lett
游客
2025-02-15
13
管理
问题
Complete the summary using the list of words, A-H, below.
Write the correct letters, A-H, in boxes 37-40 on your answer sheet.
Scientific Progress towards Extending Life Expectancy
In one experiment using anti -ageing chemicals, the life of 【R37】______ was extended by half. Besides, 【R38】______ like the ones which control the ageing process in these animals have also been found in other species. Unfortunately, however, experiments on 【R39】______ have been less successful: while they live longer, the 【R40】______ controlling their growth are also affected with the result that they grow less.
A chemicals B earthworms C fruit flies D genes
E hormones F human beings G mice H organisms [br] 【R40】
选项
答案
E
解析
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