2. 外语
  3. According to the passage, people started to make glass ______. Which statement can be the main idea of the passage?

According to the passage, people started to make glass ______. Which statement can be the main idea of the passage?

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问题 According to the passage, people started to make glass ______.
Which statement can be the main idea of the passage?
选项 A、Glass is very useful because it has unusual qualities.
B、Light signals have changed the use of glass in industry.
C、Glass fibres have reduced the cost of telephone communication.
D、The use of glass fibres to carry telephone messages is an interesting new development.
答案D
解析 整篇文章都在讲玻璃的一种新兴技术——通信。
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