Complete the sentences below. Choose NO MORE THAN TWO WORDS AND/OR A NUMBER from the passage for each answer. Write your answers

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问题 Complete the sentences below.
Choose NO MORE THAN TWO WORDS AND/OR A NUMBER from the passage for each answer.
Write your answers in boxes on your answer sheet.
The modern version of Harrison’s invention is called________.

选项

答案marine chronometer

解析 Harrison发明的现代版本是什么。本题的难点在于怎么看出来是“modem version”,文中最后一段提到which turns it into a genuine modem commercial product,可以体现出“现代版本”这个概念,往前看说确定了一个叫做marine chronometer的最终版本和产品的系统(说明Harrison最初发明的航海钟一直不断演变,直至最终版本产生)。因此,本题的答案为marine chronometer。
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