From the first two paragraphs we learn that weightlessness is caused by ______. Whether we realize it or not(Para. 3), "it" ref

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问题 From the first two paragraphs we learn that weightlessness is caused by ______.
Whether we realize it or not(Para. 3), "it" refers ______.

选项 A、weightlessness
B、the continuous and universal nature of gravity
C、the fact that our bodies never forget
D、the previous statements

答案D

解析 本题是上下文语义题,参见文章第3段,其大意是:重力的持续和普遍性使我们在日常生活中很容易忽略它的存在,但我们的身体从未忘记过它。无论我们是否认识到这一点,我们已逐步形成大量默默的下意识反应来对付生活在一个重力向下的世界的恒量压力。由此可见,此处的it指的是前一句所提到的内容。
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