Who first thought of using bullocks to provide energy? In the sentence "This simple technology is centuries old" in Paragraph O

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问题 Who first thought of using bullocks to provide energy?
In the sentence "This simple technology is centuries old" in Paragraph One, "This simple technology" refers to______.

选项 A、using bullocks to produce energy
B、using pumps to draw water out
C、having bullocks walk around to make the pump move
D、connecting gears of different sizes to produce electricity

答案C

解析 本题是细节题。在文章中找到这句话,前一句和后一句分别是"它们会带动一根很沉的棍子,这根棍子又能够带动抽水泵运动起来";"科学家们认为同样的技术可以用来发电"。可以看出这种技术和后来提到的发电是要有某种联系的。因此可以直接选C。另外,从后一句话可以知道后面要说的是利用这种技术来发电,因此排除A、D。而B项未提到小牛的作用,因此也可以选出正确答案。
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