We can learn from the text that The word "bolsters"(Line 1, Paragraph 2) most probably means

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问题 We can learn from the text that
The word "bolsters"(Line 1, Paragraph 2) most probably means

选项 A、hinders.
B、negates.
C、supports.
D、switches.

答案C

解析 语义题。文章第一段提出了"过多维生素A更容易引起骨折"的论点,第二段又提到了新的证据"new evidence"对第一段进行印证或者批驳;下文又提到研究人员已发现维生素A和骨折的相关性。由此可推断出该词的意思应为"支持"。"妨碍","否定","转换"均不符合语境。
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