2. 外语
  3. The underlined, word "event" (in Paragraph 1) refers to ______. The biggest advantage of this product is that

The underlined, word "event" (in Paragraph 1) refers to ______. The biggest advantage of this product is that

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问题 The underlined, word "event" (in Paragraph 1) refers to ______.
The biggest advantage of this product is that
选项 A、it will be faster and cheaper than manual labor
B、it can climb mountainsides, drill holes, insert bars and cement
C、it can collect data on the slope’s stability
D、it can drill without a human being on board
答案D
解析 细节判断题。从第二段"The idea is to operate a machine far away that can drill without a human being on board"一句以及第一段讲滑坡人工抢险的危险，可知这种产品的最大优点就是无人操作的安全性。
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