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  3. What is the benefit of using two stranded barbed wire? The underlined word "knives" is used to ______.

What is the benefit of using two stranded barbed wire? The underlined word "knives" is used to ______.

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问题 What is the benefit of using two stranded barbed wire?
The underlined word "knives" is used to ______.
选项 A、prevent the reel from advancing to rapidly
B、twist the wire
C、separate double-stranded wire
D、cut the wire that becomes barbs
答案D
解析 本题为细节推理题。由“The wire to make the barbs is fed into the machine from the sides and cut to length by knives that cut diagonally(对角线)through the wire to produce a sharp point”这句可知刀子是用来把铁丝截成一个个倒钩刺的。
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