2. 外语
  3. A good title for this passage is ______. Newton’s theory of gravity was corrected by Einstein’s theory because of ______.

A good title for this passage is ______. Newton’s theory of gravity was corrected by Einstein’s theory because of ______.

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问题 A good title for this passage is ______.
Newton’s theory of gravity was corrected by Einstein’s theory because of ______.
选项 A、a new hypothesis about gravity
B、careful measurements of Mercury’s motion
C、new practical considerations of Newton’s theory
D、newly predicted observations
答案B
解析 文章第二段第二句“对水星的精确观测体现出水星的运动与牛顿万有引力理论预测有细微的差别，爱因斯坦的广义相对与牛顿的理论预测也差别甚微，而事实上，爱因斯坦的预测与所观察到的事实相吻合，牛顿的理论却不是这样，从而成为证明爱因斯坦新理论的其中一个关键事实”。因而选择答案B。
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