What is the age of the universe according to the passage? [br] What is the proba

游客2023-09-26 33

问题 What is the age of the universe according to the passage? [br] What is the probable meaning of "pinning down" in the Paragraph 2?

选项 A、Forcing.
B、Discovering exact details about.
C、Pressing.
D、Knowing about.

答案 B

解析首先得通过上下文来判断一下，以下四项哪项更符合前后文的意思呢? 其次还可以掌握pin down是一个短语动词，其义有三：①钉，钉住；②详细说明；③压住，压制。结合两项可以推断文中选取pin down的第二层含义。故正确的选择为B。

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