The brain is traditionally thought to sense body position in three ways. The inner ears sense motions of the head; the eyes see where the head is; and tiny sensory organs in muscles and tendons (筋) sense where the rest of the body is. More recently, researchers have realized that sensors in many other parts of the body also play a role: in the abdomen, the lower organs, and even blood vessels. As long as all of these sensors send matching signals to the brain, we feel directed. But if one or two don't match up, the brain gets confused and we become nauseated.Scientists knew the most sickening motions closely match the rate of natural breathing; they also knew that people naturally tend to breathe in time with a motion. In fact, Navy seamen in World War II discovered that they could use certain breathing tricks to combat motion sickness. But no one had ever tested whether breathing out of time with a motion could prevent nausea.35. When do people get nauseated?A. When one or two sensors don't match up.B. When the brain senses body position in three ways.C. When sensors send matching signals to the brain.D. When we feel directed.
The brain is traditionally thought to sense body position in three ways. The inner ears sense motions of the head; the eyes see where the head is; and tiny sensory organs in muscles and tendons (筋) sense where the rest of the body is. More recently, researchers have realized that sensors in many other parts of the body also play a role: in the abdomen, the lower organs, and even blood vessels. As long as all of these sensors send matching signals to the brain, we feel directed. But if one or two don't match up, the brain gets confused and we become nauseated. Scientists knew the most sickening motions closely match the rate of natural breathing; they also knew that people naturally tend to breathe in time with a motion. In fact, Navy seamen in World War II discovered that they could use certain breathing tricks to combat motion sickness. But no one had ever tested whether breathing out of time with a motion could prevent nausea. 35. When do people get nauseated? A. When one or two sensors don't match up. B. When the brain senses body position in three ways. C. When sensors send matching signals to the brain. D. When we feel directed.
题目解答
答案
解析
本题考查对文章细节信息的理解。解题思路是在文章中找到与人们感到恶心相关的描述，然后将各个选项与原文描述进行对比分析。
- 文章中明确提到“As long as all of these sensors send matching signals to the brain, we feel directed. But if one or two don't match up, the brain gets confused and we become nauseated”，意思是只要所有这些传感器向大脑发送匹配的信号，我们就会感觉有方向感。但如果有一两个传感器的信号不匹配，大脑就会混乱，我们就会感到恶心。
- 选项A：“When one or two sensors don't match up”，即当一个或两个传感器信号不匹配时，这与原文中导致人们感到恶心的原因一致，所以该选项正确。
- 选项B：“When the brain senses body position in three ways”，文章只是说大脑传统上通过三种方式感知身体位置，但并没有表明这会导致人们感到恶心，所以该选项错误。
- 选项C：“When sensors send matching signals to the brain”，根据原文，当传感器发送匹配信号时，人们会感觉有方向感，而不是感到恶心，所以该选项错误。
- 选项D：“When we feel directed”，“感到有方向感”与感到恶心没有直接关联，所以该选项错误。