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  3. From the first two paragraphs we learn that weightlessness is caused by ______. Which of the following apparatus of the body ma

From the first two paragraphs we learn that weightlessness is caused by ______. Which of the following apparatus of the body ma

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问题 From the first two paragraphs we learn that weightlessness is caused by ______.
Which of the following apparatus of the body may be less affected by removing gravity?
选项 A、The inner ear.
B、The limbs.
C、The nerves.
D、The brain.
答案D
解析 本题是推论题，参见文章第6段，其大意是：排除重力就会改变这些信号。当头部移动时，内耳再也感受不到向下的趋势了。肢体不再有重量，所以肌肉再也不需要收缩或放松来保持某种姿势或进行运动。脚踝部位对触压产生反应的神经也不发出向下的信号了。这些变化和其他一些变化使人产生方位错觉，例如感到身体或太空船突然自动改变方向。比较而言，大脑受到的直接影响没有提及，即使有一些影响也没有上述器官受到的影响那么严重。
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