单选题The reference to pieces of debris in Passage 1 (line 3) is used to ______.Ahighlight the potential uses of stone implementBcontrast this early innovation with those of later generationsCsuggest that these devices are man's greatest achievementDemphasize the significance of the creation of these toolsEimply that these tools were made from inferior materials
单选题
The reference to pieces of debris in Passage 1 (line 3) is used to ______.
A
highlight the potential uses of stone implement
B
contrast this early innovation with those of later generations
C
suggest that these devices are man's greatest achievement
D
emphasize the significance of the creation of these tools
E
imply that these tools were made from inferior materials
参考解析
解析：
文中提到“pieces of debris were deliberately reworked into tools”，接着提到工具的创造是人类进化的一个转折点，故选D项，是为了强调工具的创造的重大影响。
文中提到“pieces of debris were deliberately reworked into tools”，接着提到工具的创造是人类进化的一个转折点，故选D项，是为了强调工具的创造的重大影响。
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