2. 外语
  3. According to the passage, some engineers are trying to improve the handlebars because Paragraph 3 mainly discusses

According to the passage, some engineers are trying to improve the handlebars because Paragraph 3 mainly discusses

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问题 According to the passage, some engineers are trying to improve the handlebars because
Paragraph 3 mainly discusses
选项 A、why the children and their parents were interviewed.
B、when the children tom the handlebars through 90 degrees.
C、what causes the children, to topple over.
D、how serious injuries occur.
答案D
解析 题意：第三段主要讲重伤是怎么发生的。短丈第三段为主题句，指出了该段主要讲了“受重伤的机理”，后面各句具体描述了这一机理。故选D。
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