From the first two paragraphs we learn that weightlessness is caused by ______. The function of apparatus of the inner ear is _

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问题 From the first two paragraphs we learn that weightlessness is caused by ______.
The function of apparatus of the inner ear is ______.

选项 A、to partition into two distinct components
B、to respond to linear movement
C、to send a signal to the brain to tell us the direction of gravity
D、to respond to the weight of limb segments and other body parts

答案B

解析 本题是细节题,参见文章第5段,其大意是:内耳的前庭器官分为两部分:即环状的、充满液体的导管,其作用是感受头部所处的角度;以及两个充满钙碳酸盐晶体、嵌入凝胶体的液囊,其作用是对线性运动做出反应。
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